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