Components

CNC machined from 6061-T6 aluminum alloy, Box One Schrader Valve Caps add a touch of style to any bike. Available in anodized red, blue, and black with laser-etched Box logos.

CNC machined from 6061-T6 aluminum alloy, Box One™ Presta Valve Caps add a touch of style to any bike. Available in anodized red, blue, and black with laser-etched Box logos. Material 6061-T6 Aluminum Weight 0.25 grams / 0.008 ounces

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.

Extruded and CNC-machined from 6061-T6 aluminum, Box Two™ Stem Spacer Kits feature a lightweight design. Weights range from 0.24 to 0.29 ounces (6.7 to 8.2 grams), depending on the size. Sold in packs of five, each set provides spacing adjustments from 1 to 20 millimeters. FEATURES - Lightweight Design - Adjustment options from 1 to 20 millimeters - Fits 1" or 1-1/8" Steerer Tubes and Standard 22.2mm Handlebars SPECIFICATIONS - Inner (Ø) 1" or 1-1/8" - Height 1mm, 3mm, 5mm, 10mm 1mm, 3mm, 5mm, 10mm - Material 6061-T6 Aluminum 6061-T6 Aluminum - Weight 6.7 grams / 0.24 ounces 8.2 grams / 0.29 ounces

- 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

Box Two™ Fixed Seat Clamps are made from the finest 6061-T6 aluminum and cold-forged for strength. They are available in multiple sizes to suit a wide variety of seat tubes and riding styles. FEATURES: - Machined Rigid Frame - Secure Fixed Design SPECIFICATIONS: - Material: 6061-T6 Aluminum - Process: Cold-Forged - Hardware: Chromoly - Finish: Anodized w/Laser-Etched Graphics Size & Weight: - 25.4mm: 7 g / 0.2oz - 31.8mm: 12 g / 0.4oz

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.

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

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

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 One 31.8 shifter clamp is an accessory that converts any Box shifter to be compatible with modern drop handlebars found on gravel, cyclocross, and commuter bikes. While these bikes traditionally come with clutchless 2-by drive-trains, the addition of this clamp makes the conversion to a more user-friendly and durable Prime 9 drive-train affordable and simple. FEATURES: - Fits All Box Shifters - Matte Onyx™ Finish - Fits 31.8 Drop Bars - 2 Piece Hinged Design COMPATIBILITY: - Box One™ 9S Shifter - Box Two™ 9S Shifter - Box Three™ 9S Shifter - Box Four™ 8S Shifter SPECIFICATIONS: - Hardware 1215 Steel - Material Aluminum - Compatibility Works with 7, 9, and 11 Speed Systems - Weight 22g/0.77oz

- 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

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

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 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

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.

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

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

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

Box Two™ Brake Post Extenders are the perfect solution for those riders needing extra brake pad adjustment without switching frame sizes. CNC-machined from 6061-T6 aluminum, Box Two™ Brake Post Extenders easily mount to any frame's existing cantilever brake bosses. They provide an additional 16 mm of brake arm positioning. Typically, they are most useful when a rider transitions from one wheel size to the next (i.e., 451 to 406). Depending on your application, they can be mounted in either one of two positions -- above the frame's v-brake mounts or below (see Technical). FEATURES: - Cantilever brake boss compatible - 16 mm of brake arm positioning - 6061-T6 aluminum - Thread M10 x 1.25 SPECIFICATIONS: - Material: 6061-T6 Aluminum - Thread: M10 x 1.25 - Weight: 32 grams / 1.1 ounces

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.