The Box One Prime 9 Rear Derailleur takes the advantages of our legacy 9-speed drive-train but adds the advancements of a modern 1 by; a fully adjustable Tri-Pack Clutch, and an x-wide cage optimized for an 11-50T cassette. Forged construction steps up the durability and performance to an unparalleled level. Suited for the most demanding terrain.

Our Box Three tier delivers many of the same capabilities of its more famous siblings yet it's built upon a simpler platform. Cassettes are accessible at 11-46T or 11-50T and fashioned with steel spiders. The derailleur exploits our Limited Slip clutch technology without the Tri-pack features. Shift easily with a comparable mechanism, although you'll forgo the hinged clamp and die-cast structure. And lastly, string it all together with a Prime 9 chain but without extravagant coatings. If you're looking to bring your 2/3 by bike into the 21st century, then level up with this group!

All Box One forks are engineered and crafted using our Oversized Technology. These forks are the most important component in the quest for bike control. We’ve moved carbon from areas of low stress to areas that handle high loads. Those muscular shoulders aren’t just for looks as they are integral to achieving superior steering stiffness. When combined with Box’s other Oversized components, you’ll experience heightened responsiveness and reduced latency. Key differences: This particular model fork is tailored for larger-sized racers. It also takes our application of Oversized Technology one step further as it includes a tougher 1-1/8 inch chromoly steerer tube and stiffer 20mm through-axle cold-forged dropouts. Weight Limit: 115kg (253 lbs) with limitations per Category 2 of EN 16054:2012 Standard. FEATURES - Oversized Technology™ - Chromoly Steel Steerer Tube to Accommodate Larger-Sized Racers - 20mm Through Axle to Increase Responsiveness - Internal Butterfly for Added Durability at Steerer Tube and Fork Crown Interface

The Donnastreet tire features a smooth center for low rolling resistance and an extra grippy, super-squeaky compound. - Tear-resistant silkworm casing

- KlickFix bracket for use with all Basil handlebar bags requiring a KlickFix adapter - Easily & quickly removable - Suitable for handlebars measuring 22mm to 31.8mm - Made form composite materials - Adjustable angle

Cleat screws are intended for proper installation of the Cleat Wedge. Designed to withstand high torque levels, creating a secure and reliable connection between the rider and the bike. Available in different lengths and styles to fit most pedal systems. - 10mm SPD/MTB compatible cleat screws - 4mm Hex countersunk M5x0.8 - Compatible with most 2-hole cleats - Black oxide-coated carbon steel - 25 pieces

The Cleat Screw Kit is a bike fitter's best friend because it eliminates the difficulty (and in some cases impossibility) of finding the perfect type and length of cleat screw. - The Kit contains 150 screws (15 different screw types/sizes with a quantity of 10 each) - SPD / MTB Compatible Cleat Screws - 4mm Hex countersunk M5x0.8, compatible with most 2-hole cleats, and are black oxide coated carbon steel. Kit includes 10 of each: 10mm (PD0219), 12mm (PD1576), 14mm (PD1577), and 16mm (PD1578). - Look / Shimano Compatible Cleat Screws - 4mm Hex Button Head M5x0.8, are compatible with most 3-hole cleats, and made from stainless steel with Nylock®. Kit includes 10 of each: 8mm (PD1579), 10mm (PD1580), 12mm (PD1581), 14mm (PD1582), 16mm (PD1583), 18mm (PD1584), and 20mm (PD1585). - Speedplay Walkable Compatible Cleat Screws - Phillips Recessed Button Head - M4x0.7, are 4-hole cleat compatible and made from stainless steel with Nylock®. Kit includes 10 of each: 9mm (PD1590), 11mm (PD1591), 13mm (PD1592), and 15mm (PD1593).

- Soft foam grip donuts prevent thumb blisters from riding gloveless - Intended for use with flanged BMX grips to prevent rubbing and irritation

- BMX brake cable kits for front or rear application - 1.5mm galvanized inner slick cable - Cable length: 1700mm / 67-inches - Housing length: 1750mm / 69-inches

Grenade style Schrader Valve caps

- Allows the use of two separate cables running from detangler to brake for more precise adjustment and better feel - Attaches to rear cable guide and routes two cables around seat post

- Alloy 1-1/8" seatpost clamp - Single bolt

- Plastic spoke covers in a variety of colors - 300mm cut to fit length - 36 pieces - enough for one wheel - Increases visibility and demands attention

- Cable hanger and straddle cable - Alloy construction - Anodized finish - Great for Canti and U-Brakes

- Axle washers for use with 19mm bottom brackets - 19.1x26x2.0mm - Interface: 19mm - Sold in a 10-pack

- Teflon-coated stainless steel inner wire - Includes cable, housing, ferrules, and cable tips - Cable length: 2100mm - Housing length: 1800mm - Use: Front or Rear - Length: 2100mm - Diameter: 1.5mm - Style: BMX/MTB

- Alloy 1-1/8" seatpost clamp - Double clamp design for extra holding power on BMX bikes

- Alloy top cap with hollow bolt to allow for brake cable pass-through - ED black durable finish - Size: 1-1/8"

- Threads onto 3/8" axles - Double-sided - Oversized - Alloy - Length: 3" / 74mm - Width: .94" / 24mm - Sold as a pair

- Steel - Threads onto 3/8" axle - Knurled & grooved - Diameter: 33mm - Sold in pairs

- Bar end plugs - Sold in pairs

- Designed for caliper and U-brakes - Forged alloy lever / 2-piece hinged aluminum bracket - 2 finger - 22.2mm (7/8") clamp - Return spring - 93g each

- Upper cables measured from brake lever to detangler top plate - Lower cables are measured from detangler to cable stop/London mod - Includes adjusters compatible with most detangler styles - Use: Lower - Length: Dual Cable - Diameter: 1.5mm

- Upper cables measured from brake lever to detangler top plate - Lower cables are measured from detangler to cable stop/London mod - Includes adjusters compatible with most detangler styles - Use: Lower - Length: Fits most - Diameter: 1.5mm

- Upper cables measured from brake lever to detangler top plate - Lower cables are measured from detangler to cable stop/London mod - Includes adjusters compatible with most detangler styles - Use: Upper - Length: 7.5 – 9.5-inch - Diameter: 1.5mm

- Upper cables measured from brake lever to detangler top plate - Lower cables are measured from detangler to cable stop/London mod - Includes adjusters compatible with most detangler styles - Use: Upper - Length: 11 - 12.5" - Diameter: 1.5mm

- Upper cables measured from brake lever to detangler top plate - Lower cables are measured from detangler to cable stop/London mod - Includes adjusters compatible with most detangler styles - Use: Lower - Length: X-Long - Diameter: 1.5mm

- Designed for linear pull & mechanical disc brakes - Aluminum construction - 2.5 finger - 22.2mm (7/8-inch) clamp - Left/Right: Right - Reach adjust and return spring - 88g each

- Replacement steel sprockets for 1-piece BMX cranks - Mount Compatibility: 1-piece - Teeth: 43T - Chain Compatibility: 1/2-inch x 3/32-inch - Tooth Type: Standard

- Bottom bracket for one-piece crank - Sealed mechanism - 24 TPI - Spindle Type: One piece - Cup Material: Steel - Weight: 310-315g - Cup Type: Press Fit - Cup OD/Bearing OD: 51mm