Parts

Avid takes entry level to a whole new level with the BB5s, which feature ball bearings (where the BB comes from in the name), a melt-forged body and a CleanSweep rotor for excellent stopping power and awesome durability. Plus, an inboard pad adjustment knob lets you dial in the perfect distance between the rotor and the pads, while Avid's ingenious Tri-Align caliper-positioning system perfectly aligns the pads parallel to the rotor in seconds. And, the tool-free pad replacement and adjustment makes quick work out of accommodating for pad wear, so you always have positive, powerful braking.

- Position: Front or Rear - Brake Lever Clamp: 22.2mm - Lever Blade Material: Aluminum - Reach Adjust: Yes

The industry standard cable-actuated disc brake since its introduction is still popular due to smooth ball bearing operation and ease of installation and maintenance. - All calipers have 74mm mounting bolt spacing - For use with long cable-pull levers - Pad retraction and spring tension are adjustable - Includes steel-backed sintered pads - Brake Caliper Type: Post Mount - Brake Lever Actuation: Long Pull - Hub/Disc Compatibility: 6-Bolt - Rotor Included: No

The industry standard cable-actuated disc brake since its introduction is still popular due to smooth ball bearing operation and ease of installation and maintenance. - All calipers have 74mm mounting bolt spacing - For use with short cable-pull levers - Pad retraction and spring tension are adjustable - Includes steel-backed sintered pads - Brake Caliper Type: Post Mount - Brake Lever Actuation: Short Pull - Hub/Disc Compatibility: 6-Bolt - Rotor Included: No - Weight: 204 g

Clean up your handlebar with Avid's MatchMaker X clamp. It combines mounts for your SRAM shifters and Avid brake levers into one simple, sleek unit so you can shed grams and keep your bars nice and tidy. You can also integrate RockShox's XLoc remote for maximum convenience and ease of use.

Avid's BB7 is the mechanical-disc brake that raises the bar. It boasts dual pad-adjustment knobs and Avid's ingenious Tri-Align caliper-positioning system so you can dial in perfect braking in seconds. The BB7 also utilizes precision actuation and variable spring tension to give you serious stopping power and out-of-this-world modulation. And, this setup comes with Avid's CleanSweep rotor for consistent, powerful braking and tool-free pad replacement for easy maintenance.

This upgraded version of the BB7 has a durable anodized finish and stainless steel hardware. - For use with with long cable-pull levers - Pad retraction and spring tension are adjustable - Includes steel-backed organic pads - Caliper has 74mm mounting bolt spacing; mounting adaptors are sold separately - Brake Caliper Type: Post Mount - Brake Lever Actuation: Long Pull - Rotor Included: No - Weight: 204 g

This upgraded version of the BB7 has a durable anodized finish and stainless steel hardware. - For use with short cable-pull levers - Pad retraction and spring tension are adjustable - Due to the shape of the brake pad installation tabs, this model is not compatible with Centerlock or HSX rotors - Includes steel-backed organic pads - Caliper has 74mm mounting bolt spacing; mounting adaptors are sold separately - Brake Caliper Type: Post Mount - Brake Lever Actuation: Short Pull - Rotor Included: No - Weight: 204 g

For the stop/start world of cyclocross, Avid makes the inimitable Shorty Ultimate Rim Brake. The ideal balance of power, control and weight, the Ultimates are the choice of pro crossers across the globe. They offer an open design that clears mud quickly while also dishing out serious stopping power and modulation. Just a twist of the in-line cable adjustment knob lets you dial in cable tension, and you can choose between a wide or narrow stance for increased mud clearance or power. And, the Shorty uses standard road cartridge pads for easy maintenance.

- Box Two Replacement Brake Pads fit all Box cartridge brake shoes, as well as all other 70-millimeter cartridge brake pad holders - Replacing the pads takes just minutes and is as easy as removing the pin, sliding out the old pad, refitting the new pad and replacing the cotter pin - Made using a proprietary braking compound - Length of Pad: 70mm

Our Box One Inner Shift Cable is the perfect upgrade for your Box Three or Box Four cable. It is also an ideal replacement for your Box One or Box Two cable set-up. When combined with our Box One housing it has proved to be superior to most competitive product. We have data that demonstrates lower initial resistance and substantially less difference in resistance over time. FEATURES - Our Best Performing Cable - Slick Coated - Inner Cable 2100mm - (2) 1.8mm Cable End Crimps COMPATIBILITY - Works with 11, 9, 7, 8, 12, and 10 speeds - Weight: 14.6 grams

With a stiff, one-piece, co-molded design, Box Three™ Air Flow Brake Shoes provide the excellent stopping power and are the perfect choice for your next build. They include two-tone, dual-compound pads that feature a unique finned design that helps improve airflow. Pivoting posts aid installation and make toe-in adjustments simple and easy.

- Includes: (5) 8.5mm outer bolts, (5) 6mm outer bolts, (5) 5mm inner nuts

Box Two Brake Shoes have cartridge pad holders to fit 70-millimeter replacement pads, making it easy to swap out worn pads or, for the style-conscious, to change pad colors. Adding to the function, we designed these shoes with a pivoting post, so setting the toe-in is super easy. Features: - 70-millimeter replacement pads - Pivoting posts - Triple Compound Specs: - Material: 6061-T6 Aluminum - Pad Material: Triple Compound - Weight (per pair): 57 grams / 2.01 ounces

Want the best combination of braking power and cable strength? Box Two Linear Brake Cable Kits start with custom housing that includes stainless steel mesh-wrapped linear wires for The inner cable wires are stainless steel, so they won’t rust over time. Each cable kit includes 63 inches of Linear housing, a BMX-race specific stainless steel cable wire, two black brass ferrules, and two black alloy cable end caps. FEATURES - 63 inches of Linear housing - BMX-race specific stainless steel cable wire - Two black brass ferrules - Two black alloy cable end caps - Stainless steel cable wires SPECIFICATIONS - Weight: 24 grams / 0.84 ounces

- Ultralight, CNC-machined 6061 aluminum spacers for fine-tuning stem height - Includes one each: 3, 5, 10mm spacers and two each: 1mm spacers

The Box Four chain employs an 8-speed platform in a similar strategy to the Prime 9 but at a great price point. The chain is polished and then chemically treated to achieve corrosion resistance. We engineered the inner link spacing to be a little tighter than other 8-speed chains and is optimized for use with our Box Four Wide/Narrow Chainring.

Box Two Quick Release Seat Clamps are cold-forged, and CNC machined from 6061-T6 aluminum alloy. Weighing in at just 27 grams/0.95 ounces in the 31.8 size, they are as lightweight as tough. The head of the quick-release lever and the face of the clamp are given a proprietary low-friction surface treatment that ensures smooth lever action for the life of the clamp without the need for a bushing. Meets or exceeds ENM standards.

The Box Three BMX chain is polished and then chemically treated to achieve corrosion resistance. All Box Three chains have chamfered shifting edges, solid plates and solid pins to safeguard durability. Our unique inner link spacing is engineered to grab those modern wide/narrow chainrings. They are compatible with BMX 3/32" and 1/8" chainrings and cogs which fits most retro-modern 29 inch BMX bikes and smaller bikes.

Box One 70mm Brake Shoes feature a stiff, cold-forged, and CNC-machined cartridge body and triple-compound, 70-millimeter pads for superior braking. Mounting posts that pivot allow for perfect pad alignment, while silver machined accents and laser-etched graphics offer refined aesthetics. - 70-millimeter replacement pads - Pivoting posts - Triple Compound - silver machined accents

Cold-forged and CNC machined from 6061-T6 aluminum alloy, Box One Fixed Seat Clamps are tough, lightweight, and exceptionally good looking. Featuring titanium hardware and laser-etched graphics, Box One Fixed Seat Clamps are available in anodized black, blue, red, and silver.

Box One Linear Brake Cable Kits are among the most advanced BMX brake cables on the market. The custom Concentric housing includes aramid fiber-wrapped aluminum/steel linear wires for the best combination of strength and low weight. The inner Nano Cable wires are treated with a PTFE coating that reduces friction and boosts braking performance. Our anodized aluminum Kollars ferrules further reduce cable drag. Each cable kit includes 79 inches of Concentric Linear housing, a black PTFE-coated Nano Cable, four alloy Kollars ferrules and one color-matched and one black alloy cable end caps. Available in chrome, 14K gold, red, blue and black with alloy Kollars ferrules and end caps.

The Box Three Disc Brake Rotor is a Stainless Steel, 6 bolt rotor designed for BMX Race. Utilizing a small size and rounded outside edges for safety is the optimal size for any BMX Race bike. FEATURES: - ISO 6 bolt brake/hub interface - Rounded outside edges - Lightweight Cutouts - High quality stainless steel rotor - High quality locking steel T-25 rotor bolts included

- Cold forged, CNC-machined cartridge body with self-aligning pivoting posts - Triple-compound 70mm pads

- Heat treated allow steel solid links with solid pins - Compatible with SRAM, Shimano, and Box 11 speed drivetrains - Also compatible with Box's 7 speed downhill specific drivetrain

Box One 7075 Alloy Chainring bolt kits include five 8.5-mm front bolts, five 6-mm front bolts, and five 5-mm rear nuts, so they will fit just about any chainring/crank combination, including those with threaded holes.

Box Three V-Point Brake Levers are the most versatile levers in the entire Box family. Available in either short or long reach versions, Box Three Levers are reversible, allowing users to 'flip' the lever for use on either side of the handlebar. Other features include reaching adjustment for accurate positioning and a barrel adjuster to fine-tune cable tension.

Box Three V-Point Brake Levers are the most versatile levers in the entire Box family. Available in either short or long reach versions, Box Three Levers are reversible, allowing users to 'flip' the lever for use on either side of the handlebar. Other features include reaching adjustment for accurate positioning and a barrel adjuster to fine-tune cable tension.

- CNC-machined 6061-T6 aluminum with titanium hardware - Zero-friction cam surface treatment ensures smooth lever action - 31.8mm - 27g

Box One 70mm Carbon Brake Pads were formulated with a special compound compatible with carbon fiber rims. This helps keep the heat down while still creating high-performance stopping power. Paired with our Box One Brake Pad Cartridge Body so you can pull them out of the bike and put them right on the bike! Sold as a pair. Features: - High Performance - Stopping Power Specs: - Material: 6061-T6 Aluminum - Weight: 55 grams

The Box Four shifter's main features aren't strikingly different from Box Three's. The key difference is its 8-speed platform. We've chosen to modernize the 8-speed in much the same way we did the 9-speed for Prime 9. Just like the Prime 9, the Box Four shifters take advantage of the "less is more" theme and exploit durability, simplicity, and reliability. Available as a multi-shift (pull several gears at once) or single-shift shifter (a sound choice for e-bikes).

The Box Three BMX Disc Brake Caliper is here! With a post-style mounting interface made of carbon steel, this disc brake caliper is all you need to improve control. Weighing only 130 grams, this lightweight gadget will spring you smoothly through every turn. All you need to do is focus on the finish line. FEATURES - Post mounting interface. - BMX brake lever compatible. - Mechanically (cable) actuated. COMPATIBILITY - Compatible will all size rotors - Compatible replacement pads are BB5 SPECIFICATIONS - Material: Carbon Steel - Weight: 130g

DESCRIPTION The Box Three Brake is available in 85mm with short reach lever or 108mm with long reach lever. They include two-tone, dual-compound pads that feature a unique finned design that helps improve airflow. The Philips head tension screws aid installation and makes toe-in adjustments simple and easy. FEATURES - Cold Forged from 6061-T6 Aluminum - Up to 35mm of brake pad adjustment - Box Three™ Air Flow Brake Shoes w/ Dual Compound Pads - Brass bushings, Stainless Steel Hardware - Phillips head tension screw - 5mn allen key to secure cable on right arm

The Box Three shifter makes good use of nylon composites in both top and bottom shells as well as the levers. Box Three is our performance and value tier. So this shifter sheds all the fancy trappings of the top 2 tiers but maintains their shifting characteristics. All Prime 9 shifters take advantage of the 9-speed's inherent durability, simplicity, and reliability. Not only is the shifter mechanism joyfully simplified, but fewer shifts are needed for every mile of travel. And the best part is? Prime 9 is also terribly forgiving so you won't have to constantly adjust your set-up. Available as a multi-shift (pull several gears at once) or single-shift shifter (a sound choice for e-bikes).

The Box Three shifter makes good use of nylon composites in both top and bottom shells as well as the levers. Box Three is our performance and value tier. So this shifter sheds all the fancy trappings of the top 2 tiers but maintains their shifting characteristics. All Prime 9 shifters take advantage of the 9-speed's inherent durability, simplicity, and reliability. Not only is the shifter mechanism joyfully simplified, but fewer shifts are needed for every mile of travel. And the best part is? Prime 9 is also terribly forgiving so you won't have to constantly adjust your set-up. Available as a multi-shift (pull several gears at once) or single-shift shifter (a sound choice for e-bikes).

Box Two Square Taper Chromoly Bottom Brackets are the best option for young BMX racers and other users of three-piece cranks in search of an affordable, high-performance square taper bottom bracket. Each bottom bracket is hand-assembled with a Chromoly spindle, sealed bearings, forged and CNC-machined alloy cups, and a composite center spacer/seal. Features: - Precision Abec-5 Sealed Bearings Compatibility: - Box Five Square Taper Crankset Specs: - Process: CNC-Machined Cups Material: - Spindle: Chromoly - Cups - Alloy - Sleeve - ABS Plastic - Finish: Nickel Coating - Spindle Type: JIS Square Taper - Spindle Length: 108mm or 113mm - Shell Width: 68mm - Thread: 1.37" x 24 TPI - Compatibility: BSA Threaded - Weight [108-113] (+/- 5%): 272 g / 9.6 oz

The Box One Disc Brake Adapter is designed to improve braking control on frames where disc brakes were not standard. Compatible with 2 types of dropouts and 3-10mm hubs, the Box Disc Brake Adapter goes over your hub’s axle and mates with the frame’s dropout in the right configurations allowing mounting of a standard post mount disc brake caliper. Please note this product is NOT universally compatible. We strongly recommend reading the Compatibility and Installation instructions for details before purchasing Compatibility: - Box Three Pro Disc Hub - Box Three Brake Caliper - Box Three 140mm Disc Brake Rotor - ALL Box Brake Levers - Box Linear Brake Cables Specs: - Post Mount Caliper Compatibility - 140mm Brake Rotor Only - 6061-T6 Aluminum - Standard 10mm Dropout - 60g - Fits 3 - 10mm hubs (See Compatibility Below) - 150lb Rider Weight Limit

The Box One Disc Brake Adapter is designed to improve braking control on frames where disc brakes were not standard. Compatible with 2 types of dropouts and 3-10mm hubs, the Box Disc Brake Adapter goes over your hub’s axle and mates with the frame’s dropout in the right configurations allowing mounting of a standard post mount disc brake caliper. Please note this product is NOT universally compatible. We strongly recommend reading the Compatibility and Installation instructions for details before purchasing. FEATURES - 3-10mm hub - 6061-T6 aluminum - 140mm Brake Rotor Only - Post Mount Caliper Compatibility - 150lb Rider Weight Limit

- CNC-machined 6061-T6 aluminum with rounded tooth profile to reduce chain wear

The Box Four cassette adapts our Prime 9 philosophy of durability, simplicity, and reliability at a great price point. All cogs are stamped from steel, given our durable black coating and then the larger cogs are pinned to each other with spacers for easy installation. - Compatible with HG freehub bodies - Steel stamped cogs - No spiders - Wide ratio and consistent progression - ED black protection

Made in the US from 6061-T6 aluminum alloy, Box Two Chainrings are round and true. They fit 104 BCD four-bolt cranks and are available in black anodized with laser-etched graphics from 38 to 45-teeth.

Box Two 24mm External bottom brackets feature cold-forged, CNC-machined alloy cups, dual-labyrinth bearing covers, and precision sealed bearings. They are the perfect match to Box Three, Four cranks, and the ultimate upgrade to the budget BBs sold with most cranksets. Box Two, 24mm External Bottom Brackets, are designed to fit all 24-millimeter crank spindles and frames with 68 or 73 x BC 1.37-inch bottom bracket shells. Features: - Stable Outboard Bearing Position - Precision Abec-5 Sealed Bearings Compatibility: - Compatibility: Box Three, Box Four, Shimano HollowTech II, RaceFace X-Type - Material: 6061-T6 Aluminum - Shell Width: 68mm/73mm - Spindle Type: 24mm - Thread: 1.37 Inch x 24 TPI - Weight: 105 grams / 3.7 ounces Specs: Process: CNC-Machined Cups Material: - Cups: Alloy - Sleeve - ABS Plastic Finish: Anodized Spindle Type: 24mm Shell Width: 68/73mm Thread: 1.37 Inch x 24 TPI (English) Compatibility: - Shell: BSA (Euro) Threaded - Spindle: Box Three, Box Four, Shimano HollowTech II, RaceFace X-Type Weight (+/- 5%): 105 g / 3.7 oz

The Box Two shifter is the only shifter on the market (other than our Box One) that comes factory stock with a hinged clamp. Box Two is our performance tier so this shifter still maintains the durable cast aluminum top shell but trades out the Box One's 1-piece pull-lever for a 2-piece resin and steel variant. All Prime 9 shifters take advantage of the 9-speed's inherent durability, simplicity, and reliability. Not only is the shifter mechanism joyfully simplified, but fewer shifts are needed for every mile of travel. And the best part is? Prime 9 is also terribly forgiving so you won't have to constantly adjust your set-up. Available as a multi-shift (pull several gears at once) or single-shift shifter (a sound choice for e-bikes).

The Box Two shifter is the only shifter on the market (other than our Box One) that comes factory stock with a hinged clamp. Box Two is our performance tier so this shifter still maintains the durable cast aluminum top shell but trades out the Box One's 1-piece pull-lever for a 2-piece resin and steel variant. All Prime 9 shifters take advantage of the 9-speed's inherent durability, simplicity, and reliability. Not only is the shifter mechanism joyfully simplified, but fewer shifts are needed for every mile of travel. And the best part is? Prime 9 is also terribly forgiving so you won't have to constantly adjust your set-up. Available as a multi-shift (pull several gears at once) or single-shift shifter (a sound choice for e-bikes).

The Box Three Brake is available in 85mm with short reach lever or 108mm with long reach lever. They include two-tone, dual-compound pads that feature a unique finned design that helps improve airflow. The Philips head tension screws aid installation and makes toe-in adjustments simple and easy. Box Three V-Point Brake Levers are the most versatile levers in the entire Box family. Available in either short or long reach versions, Box Three Levers are reversible, allowing users to 'flip' the lever for use on either side of the handlebar. Other features include reaching adjustment for accurate positioning and a barrel adjuster to fine-tune cable tension. Features: - Cold Forged from 6061-T6 Aluminum - Up to 35mm of brake pad adjustment - Box Three Air Flow Brake Shoes w/ Dual Compound Pads - Brass bushings, stainless steel hardware - Phillips head tension screw - 5mn allen key to secure cable on right arm - Includes Box Two Black Brake Housing and Stainless Steel Cable

The Box Three Brake is available in 85mm with short reach lever or 108mm with long reach lever. They include two-tone, dual-compound pads that feature a unique finned design that helps improve airflow. The Philips head tension screws aid installation and makes toe-in adjustments simple and easy. Box Three V-Point Brake Levers are the most versatile levers in the entire Box family. Available in either short or long reach versions, Box Three Levers are reversible, allowing users to 'flip' the lever for use on either side of the handlebar. Other features include reaching adjustment for accurate positioning and a barrel adjuster to fine-tune cable tension. - Cold Forged from 6061-T6 Aluminum - Up to 35mm of brake pad adjustment - Box Three Air Flow Brake Shoes w/ Dual Compound Pads - Brass bushings, stainless steel hardware - Phillips head tension screw - 5mn allen key to secure cable on right arm - Includes Box Two Black Brake Housing and Stainless Steel Cable

The Box Four Rear Derailleur is the base of Prime 9 Technology that offers an affordable clutch based 1 by 8-speed derailleur that is simple and light; this makes it a perfect candidate for every entry-level bike that traditionally has a 3 by drive-train that is neither durable nor user friendly.

- Superlight co-molded nylon shell and carbon fiber seatpost specifically for BMX Race - Large saddle has a 27.2 seatpost, while the small has a 22.2 post

All Box stems are engineered and crafted using our Oversized Technology. As we follow the load paths down the handlebars we have focused our attention on the stem-to-bar interface. Since the Oversized handlebars have an increased wall thickness and tube diameter in this sector we have reciprocated with an augmented stem interface with greater surface area. We’ve done this by moving material from low stress areas. This has greatly minimized twist and contributed to responsiveness. As the stem in mated with the handlebars we have contributed to increased pedaling stiffness by providing a backstop to the “lifting” phenomenon. There is no point pushing hard on your pedals if you can’t pull up on your handlebars and deliver that power. Power can easily be lost to handlebar-to-stem deflection and the consequences can be poor power delivery and steering control. When combined with Box’s other Oversized components, you’ll experience heightened responsiveness and reduced latency. Key differences: In this particular model stem we’ve tailored the Oversized strategy to favor utility and access. The geometry has been altered to allow for easy handlebar removal while at the same time scavenging material from low stress zones. Ideal for those who don’t want to compromise on user experience to gain performance. These stems are engineered for the larger-sized racers.

The Box Three Prime 9 cassette is a great all-around cassette option. All cogs are stamped from steel and subsequently, the larger ones are pinned to alloy spiders. It also features weight-reducing holes on the cogs. - The Box Three Prime 9 offers ultra-wide ratio with consistent progressions - Prime 9 technology offers the same range as a 12-speed drivetrain, with fewer gears to shift through - Fewer parts, reduced weight, and increased durability - Cogs pinned to lightweight spiders - Constructed using a standard freehub body (HG) - Cassette Body Type: Shimano/SRAM 8, 9, 10 Speed - Drivetrain Speeds: 9 - Designed for ebike: Yes - Color: ED Black

- Cold-forged, CNC-machined 6061-T6 aluminum with built-in return spring - Clamp integrates with ODI Lock-On grips - 50g

Box One Genius brake levers are the first ever to incorporate a clamp for ODI Lock-On grips. This ensures that your grips stay put while eliminating the need for an extra clamp. At roughly 50 grams, these cold-forged and CNC-machined levers beat any other on the market. Genius levers have a built-in return spring and are fully compatible with carbon handlebars. The Mid reach lever features a new design that puts it in the same reach position as the Long, but with a more BMX-specific blade for better one-finger leverage. Other features include adjustable reach, a titanium mounting bolt, and stainless steel hardware. Genius levers are designed to work with linear-pull brakes. They are excellent for BMX, mountain, city, urban, and tandem flat-bar bicycles.

The Box Three Rear Derailleur simplifies the features found on the Prime 9 Box One and Two rear derailleurs making for a fully featured wallet friendly rear derailleur. Including a Limited Slip Clutch, Sealed bearing pulleys and a solid construction Box Three Rear derailleurs are compatible with 11-46 and 11-50t derailleurs making it one of the most versatile derailleur offerings for Prime 9.

Hollow stems are cold forged from the highest quality 6061-T6 aluminum available. Featuring an open skeletal design and a dual mid-bolt wedge mounting system, they are lightweight yet maintain a very high level of strength. A 53mm extension stem weighs just 218 grams/7.7 ounces. By removing the rear pinch bolts and moving the mounting bolts to the middle of the stem, we reduced the weight and size and eliminated a serious hazard to the rider’s knees. These stems come with either a 48- or 53mm extension and a 22.2mm bar bore. To ensure proper clamping force, the stem must be mounted on a fork with at least 45mm of exposed steerer tube. Not compatible with forks that have carbon fiber steerer tubes.

The Box One multi shifter is the only shifter on the market that comes factory stock with a hinged (and machined) clamp. It's top of the line and comes packed with other features such as a durable cast aluminum pull lever and top shell. All Prime 9 shifters take advantage of the 9-speed's inherent durability, simplicity, and reliability. Not only is the shifter mechanism joyfully simplified, but fewer shifts are needed for every mile of travel. And the best part is? Prime 9 is also terribly forgiving so you won't have to constantly adjust your set-up. Available as a multi-shift (pull several gears at once) or single-shift shifter (a sound choice for e-bikes).

The Box One multi shifter is the only shifter on the market that comes factory stock with a hinged (and machined) clamp. It's top of the line and comes packed with other features such as a durable cast aluminum pull lever and top shell. All Prime 9 shifters take advantage of the 9-speed's inherent durability, simplicity, and reliability. Not only is the shifter mechanism joyfully simplified, but fewer shifts are needed for every mile of travel. And the best part is? Prime 9 is also terribly forgiving so you won't have to constantly adjust your set-up. Available as a multi-shift (pull several gears at once) or single-shift shifter (a sound choice for e-bikes).

The BOX Two Prime 9 Cassette delivers long service life and extra range. All cogs are stamped from steel and the larger ones are pinned to alloy spiders. - Cogs pinned to lightweight spiders - Ultra-wide ratio with consistent progression - Prime 9 technology - Compatible with HG freehub bodies - 12 – 50T: Rated for eBike use

- Cold-forged 6061-T6 aluminum arms, available in 85mm or 108mm - Precision sealed bearing pivots, titanium and stainless steel hardware - Flexible cable noodle and streamlined cable fixing point - 35 millimeters of vertical brake pad adjustment

For Box braking we’ve limited the use of our Oversized Technology to the V area since the levers need to be minimalist and largely act as a remote for the V-Brakes. To reduce lateral deflection at the V we chose to enlarge the pivot areas and arms while tightening tolerances at their interfaces. We robbed material from unloaded sections to reinforce these zones of high stress. Not only are you going to be more efficient with brake power delivery, but you’ll also feel the instant response of deceleration. Key differences: The Box One V-Brake are the only brakes in the Box line-up to be blessed with Oversized Technology. They are also the only model to use sealed precision bearings to further reduce non-rotational movement. The 108mm long-reach brakes are excellent for BMX, mountain, city, urban and tandem bicycles using linear-pull-compatible levers. The 85-mm short reach (AKA mini-V) brakes are an excellent choice for cyclocross or drop-bar gravel bikes.

The Box Two Prime 9 Rear Derailleur is very similar to the Box One version however, to be more wallet friendly, it offers a non adjustable Tri-Pack Clutch, bushing pulleys and some muted finishes. Box Two rear derailleurs are still optimized for 11-50t cassettes and offer durability and performance for the most demanding terrain, just at lower price!