The Box Four Cold Forged Crankset-Black features a one-of-a-kind 4 bolt spider with a support ring for extra flex resistance. Keeping things easy to install and long-lasting is the 24mm spindle which is pressed into the drive side crank arm. The other side connects to the spindle using a strong two bolt pinch system.
FEATURES
- Oversized Bottom Bracket Interface
- Durable Cold-Forged Construction
- Dual Pinch Bolts for Even Clamping Force
- 4-bolt 104 BCD Spider with Flex-Resistant Ring
- 24mm Chromoly Spindle
COMPATIBILITY
- Box Two Chainring
- Box One Chromoly Chainring Bolts
- Box One 7075 Alloy Chainring Bolts
- Box Two 24mm bottom bracket
- Box Extremum RacePrep bottom bracket
SPECIFICATIONS
- BB (Included): BSA 1.37
- Spindle: 24mm Chromoly
- Material: 6061 T-6 Aluminum
- Process: Cold-Forged
- Chainline: 44.5mm
- Weight: 900 grams / 31.7 ounces