Parts

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.

Our Box One Shift Cable & Housing Kit is the easiest way to get silky smooth and consistent shifts on any drivetrain. Replace your Box One, Box Two, Shimano and SRAM kit, or upgrade your Box Three or Box Four set-up. This kit is a combination of our best performing Cable Housing and Slick Coated Stainless Steel inner cable. In lab tests this combination 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 - Inner Cable 2100mm - Our Best Performing Housing - 4mm Housing 2000mm - Prepared with silicone grease - (2) 1.8mm Cable End Crimps - (3) 4mm Sealed Short Ferrules COMPATIBILITY - Works with 12, 11, 10, 9, and 8 speeds. - Weight: 84.3 grams

- 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

The Box Two chain's nickel plating adds both corrosion and wear resistance. All Prime 9 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. We chose to modernize the 9-speed platform due to the chain's spirited reputation. FEATURES - Prime 9 Technology - Our Most Durable Chain - Wide/Narrow Chainring Compatible - Durable Hardened Solid Pins - Includes Nickel Connecting Link - Nickel Plated Protection - Extra Long for Long Wheel Base & Cargo Bikes IMPORTANT NOTES - Available in 2 lengths: 126L & 144L - Compatible with BMX 3/32" Chainrings and Cogs - Compatible with most 10,11, & 12-speed wide/narrow chainrings. COMPATIBILITY - Box One Prime 9 11-50T and also 12-50T eBike Cassette Black - Box Two Prime 9 11-50T and also 12-50T eBike Cassette Black - Box Three Prime 9 11-50T and also 12-50T eBike Cassette Black - Box One Prime 9 Rear Derailleur - Box Two Prime 9 X-Wide Rear Derailleur Black - Box Three Prime 9 X-Wide Rear Derailleur Black - Box One Prime 9 Shifter Black - Box Two Prime 9 Shifter Black - Box Three Prime 9 Shifter Black - Box Two Chainring - Box One Single Speed Aluminum Cogs - Box One Single Speed Chromoly Cogs - Box Two Freewheel - Perfect for your 3/32" BMX Chainring

Box One™ fork adapters let you run standard "Male" 10mm (3/8" axles) in a fork designed for 20mm axles. - Material 6061-T6 Aluminum

The Box Two BMX 1/8"x112 link chain's nickel plating adds both corrosion and wear-resistance to your ride. All BMX chains have solid plates and solid pins to safeguard durability. They are compatible with BMX 3/32" chainrings and cogs and fits most retro-modern 29 inch BMX bikes. FEATURES - Our Most Durable Chain - Nickel Plated Protection - Includes Nickel Connecting Link - Durable Hardened Solid Pins - Fits 29 Inch BMX Bikes COMPATIBILITY - Hex Lab Titanium Cogs - Box One Single Speed Aluminum Cogs - Box One Single Speed Chromoly Cogs - Box Two Freewheel

Box One Single-Speed Aluminum Cogs are 7075-T6 aluminum alloy. It's designed to fit Shimano compatible cassette hubs and has a 5mm wide inner base, giving a more solid interface with the cassette body. The alloy cogs are anodized black with laser-etched graphics. FEATURES - Shimano Compatible Driver - 7075-T6 Alloy - 3/32" or 1/8" Chain Compatible - Lightweight SPECIFICATIONS - Material: 7075-T6 Aluminum - Process: Laser-etched logos Weight - 13t: 8 grams / 0.3 ounces - 14t: 11 grams / 0.4 ounces - 15t: 13 grams / 0.5 ounces - 16t: 14 grams / 0.8 ounces - 17t: 16 grams / 0.6 ounces - 18t: 18 grams / 0.65 ounces

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

Box One Single-Speed Chromoly Cogs are CNC-machined from long-wearing CNC-machined chrome-molybdenum. It's designed to fit Shimano™ compatible cassette hubs and has a 5mm wide inner base, giving a more solid interface with the cassette body. FEATURES - Chromoly Steel Offers Extra Long Service Life - 5mm Wide Inner Base to Give a More Solid Interface with Freehub Body

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). -Our 8 is Enough Shifter -Lightweight Extruded Clamp -Responsive 2 Piece Pull Lever -MTB Style Release Lever (V2) Weight: 128g/4.5oz

Cold forged and fully CNC-machined from several high-strength aluminum alloys, new Box One™ Stem Locks offer peace of mind and a level of added protection against losing your front wheel and fork legs in the event of a broken steerer tube. All new Box One™ Stem Locks are backward compatible with existing Box forks and may work with forks from other manufacturers.

Cold forged and fully CNC-machined from several high-strength aluminum alloys, new Box One™ Stem Locks offer peace of mind and a level of added protection against losing your front wheel and fork legs in the event of a broken steerer tube. All new Box One™ Stem Locks are backward compatible with existing Box forks and may work with forks from other manufacturers.

Box Two™ Integrated Headsets feature an aluminum compression cap, CNC-machined bearing cover, and split crown race with super-smooth rolling, precision 45x45 bearings. FEATURES - Precision Sealed Bearings COMPATIBILITY - Box One X2 Fork - Box One XL Fork - Box One Stem Lock - Frames with an Integrated NON-Tapered Head Tube

Designed to pair with Box's 11-speed mountain bike rear derailleurs, the Box Two Twin Lever 11-Speed Shifter has some pretty sweet ergonomics with its dedicated thumb and index finger controls. This new twin lever design is a slightly different design from other brands lever offerings and should help prevent miss shifts and provide precise and reliable gear changes both up and down the cassette. One of our favorite features of the Box Two Twin Lever is its ability to downshift up to four gears at a time so you can roll into a climb with speed and quickly grab the gears you need so you can easily make it to the top. Its aluminum and glass fiber with nylon composite construction keeps things nice, light, and durable while keeping its cost low. It includes a smooth stainless steel cable so you can get it bolted up to the bars and hit the trail.

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).

- 3-D forged from the finest 6061-T6 aluminum - Oversized clamp fits 35.0mm bars

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 One chain is protected by our dual-coating. We start with Nickel plating which aids in corrosion resistance and then top it off with the "Diamond-Like Carbon" layer. The DLC is as fancy as it sounds; a synthetic diamond nano-coating that turns up the volume on hardness, wear-resistance, and slickness. All Prime 9 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. We chose to modernize the 9-speed platform due to the chain's spirited reputation. FEATURES - Our Best Performing Chain - Durable Dual-Coating - Includes Black Connecting Link COMPATIBILITY - Box One Prime 9 11-50T and also 12-50T eBike Cassette Black - Box Two Prime 9 11-50T and also 12-50T eBike Cassette Black - Box Three Prime 9 11-50T and also 12-50T eBike Cassette Black - Box One Prime 9 Rear Derailleur - Box Two Prime 9 X-Wide Rear Derailleur Black - Box Three Prime 9 X-Wide Rear Derailleur Black - Box One Prime 9 Shifter Black - Box Two Prime 9 Shifter Black - Box Three Prime 9 Shifter Black - Box Two Chainring - Box One Single Speed Aluminum Cogs - Box One Single Speed Chromoly Cogs - Box Two Freewheel - Perfect for your 3/32" BMX Chainring

The Box Two Front Top is a modern 1-1/8 inch by 22.2mm stem designed specifically for BMX racing. Box Two Top Load stem bodies are cold-forged and CNC-machined from the highest quality 6061-T6 aluminum. The lightweight front clamps are cold-forged and CNC-machined for increased stiffness and strength. -Material: 6061-T6 Aluminum -Process: Cold-Forged -Hardware: Chromoly Clamping Bolts -Finish: Anodized w/Laser-Etched Graphics Weight: -48mm: 234 g / 8.3 oz -53mm: 240 g / 8.5 oz

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.

The Box Two Front Load is a modern, 22.2 stem designed specifically for BMX racing. Box Two Front Load stem bodies are cold-forged and CNC-machined from the highest quality 6061-T6 aluminum. The lightweight front clamps are cold-forged and CNC-machined for increased stiffness and strength. -Material: 6061-T6 Aluminum -Process: Cold-Forged -Hardware: Chromoly Clamping Bolts -Finish: Anodized w/Laser-Etched Graphics Weight: · 48mm: 224 g / 7.9 oz · 53mm: 230 g / 8.1 oz

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

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