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Box Four Cold Forged Crankset-Black

Box
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$135.96 $169.95
  • 160mm
  • 165mm
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About This Product: Box Four Cold Forged Crankset-Black

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

Crank Size Chart

Crank Size Chart
Inseam length Crank Length
Crank Size: Micro, Mini. Junior
Inseam length: 15 - 16 inch Crank length: 130 mm
Inseam length: 16 - 17.5 inch Crank length: 135 mm
Inseam length: 17.5 - 19 inch Crank length: 140 mm
Inseam length: 19 - 20 inch Crank length: 145 mm
Inseam length: 20 - 22 inch Crank length: 150 mm
Crank Size: Junior, Expert, Expert XL
Inseam length: 20 - 22 inch Crank length: 150 mm
Inseam length: 22 - 23 inch Crank length: 155 mm
Inseam length: 23 - 25 inch Crank length: 160 mm
Inseam length: 25 - 26 inch Crank length: 165 mm
Crank Size: Pro and Larger
Inseam length: 26 - 27 inch Crank length: 170 mm
Inseam length: 27 - 28 inch Crank length: 175 mm
Inseam length: 28 - 30 inch Crank length: 177.5 mm
Inseam length: 30 - 31 inch Crank length: 180 mm
Inseam length: 31 - 32 inch Crank length: 185 mm
Inseam length: 33+ inch Crank length: 190 mm

How To Measure Your Inseam

  1. Start with a pair of pants you already have that fit you well and lay them flat on the floor.
  2. Carefully measure the length from the crotch seam to the bottom of the leg.
  3. THIS NUMBER IS YOUR INSEAM. Use this number to help you choose your cranks.