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Box Three Hollow Crankset-Black - 1
Box Three Hollow Crankset-Black - 2
Box Three Hollow Crankset-Black - 3
Box Three Hollow Crankset-Black - 4
Box Three Hollow Crankset-Black - 5

Box Three Hollow Crankset-Black

Box
$309.95
  • 170mm
  • 175mm
  • 177.5mm
  • 180mm
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About This Product: Box Three Hollow Crankset-Black

The Box Three Crankset features a hollow-forged 2-piece design with an oversized bottom bracket interface. The 24mm spindle is pressed into the drive side crank arm for durability and easy installation. The non-drive side crank arm features a 2-bolt pinch system for added strength. Our unique 4-bolt 104 BCD spider features a flex-resistant ring for optimum performance.

Box Three Cranks feature steel pedal inserts that require pedal washers and externally sealed bearing BSA bottom brackets, both provided in the box.

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

FEATURES

  • Oversized Hollow Forged Design
  • Dual pinch bolts for even clamping force
  • 4-bolt 104 BCD Spider with Flex-Resistant Ring
  • 24mm chromoly spindle
  • External BSA BB Included

SPECIFICATIONS

Box Two M30-P Crankset Specifications
Arm Length BB Spindle Material Process Chainline Weight
Arm Length: 170mm BB: BSA 1.37 Spindle: 24mm Chromoly Material: 6061-T6 Aluminum Process: Hollow-Forged Chainline: 44.5mm Weight: 1,010 g /35.6 oz
Arm Length: 175mm BB: BSA 1.37 Spindle: 24mm Chromoly Material: 6061-T6 Aluminum Process: Hollow-Forged Chainline: 44.5mm Weight: 1,020 g / 35.9 oz
Arm Length: 177.5mm BB: BSA 1.37 Spindle: 24mm Chromoly Material: 6061-T6 Aluminum Process: Hollow-Forged Chainline: 44.5mm Weight: 1,020 g / 35.9 oz
Arm Length: 180mm BB: BSA 1.37 Spindle: 24mm Chromoly Material: 6061-T6 Aluminum Process: Hollow-Forged Chainline: 44.5mm Weight: 1,010 g / 35.6 oz

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.