Parts

- Prevents chain derailment when shifting to inner ring - Adjustable hose-type clamp fits 1-1/8" to 1-3/8" seat tubes

Super hardened steel designed for high torque Singlespeed and BMX use.

- Aheadset preload adjusting bolt

- Chromoly steel with black oxide finish - 1.37" x 24tpi right hand thread - Requires a cog lockring (sold separately) - Compatible with 1/8-inch chains

- Noodle/Boot completely seal brake cable, upgrades most linear brakes

- Includes stainless bolts - Fits 160mm front and 140mm rear rotors

Avid, Post Bracket, Includes Stainless Caliper Mounting Bolts (CPS and Standard)

- Includes stainless steel bolts - 40mm fits 200mm Front and 180mm Rear Rotors

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

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

The Box One Cassette Spacer Kit is extruded and CNC-machined from 6061-T6 aluminum and features a super lightweight minimalist design. Packaged in 4-piece kits which provide 1 to 10 millimeters of spacing adjustment to dial in that chain line. FEATURES - Adjustable from 1mm to 10mm for Adjusting Chainline - Extremely Lightweight XO Skeleton Design SPECIFICATIONS - Material: 6061-T6 Aluminum - Extruded & CNC Machined - Anodized Finish - Spacing: 1-10mm (1mm [2], 3mm [1], 5mm [1]) - Driver: HG Freehub Body

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

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.

The Box Four Wide/Narrow chainring completes that package for the 1x8 system. It is the first 8-speed specific chainring designed to optimize chain retention when using 8-speed chains. The tooth profile and thicknesses are tailored to match the inside geometry of the unique Box Four chain. FEATURES - Our 8 is Enough Chainring - Forged & CNC Steel - ED Black Protection - Wide / Narrow 8s Specific - 104 BCD Compatible

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

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 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

- 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

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