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Shimano DXR MX71 Cranks - 1
Shimano DXR MX71 Cranks - 2

Shimano DXR MX71 Cranks

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$399.95 $399.95
  • 165mm
  • 170mm
  • 175mm
  • 180mm
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About This Product: Shimano DXR MX71 Cranks

The Shimano DXR MX71 Cranks at J&R Bicycles feature updated design elements created specifically for the rigorous demands of the BMX racetrack. Shimano re-designed their MTB Saint Cranks engineered them to fit BMX applications. Made from hollow-forged aluminum for lightweight durability with a stiff and rigid design and shortened spindle that ensures precise chain alignment for optimal power transfer.

Please note: that the chainring is not included with the cranks, allowing you to customize your gearing setup to suit your racing needs.


  • Material: Hollow-forged aluminum construction for strength and lightweight performance
  • Crank Arm Length: Available in various lengths to suit your preference
  • Bottom Bracket Compatibility: Works with Shimano Hollowtech II bottom brackets for smooth and efficient pedaling
  • Chainring Compatibility: Designed for use with a single chainring setup
  • Chainring Size: Accommodates various chainring sizes for versatile gearing options
  • BCD (Bolt Circle Diameter): 104mm BCD
  • Installation: Easy to install with standard crank arm installation tools

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.