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Crupi Rhythm Pro Select Crankset-Silver

  • 170mm
  • 175mm
  • 180mm
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About This Product: Crupi Rhythm Pro Select Crankset-Silver

The Crupi Rhythm Pro Select Cranks-Silver at J&R Bicycles are high-quality cranks built for max strength with minimal weight added to your drivetrain. These cranks are designed with hollow cold-forged aluminum alloy arms to deliver lightweight strength with added rigidity for super stiff responsiveness. The 10-spline spindle is made from heat-treated chromoly alloy for increased durability and is compatible with most BB shell types. Made with a removable spider that works with 104 BCD chainrings (chainring is not included) the Rhythm Pro Select Cranks require an EB24/BSA24 sealed bearing bottom bracket (sold separately). The included pedal washers must be used at all times.


  • 24mm 10-Spline hollow heat treated chromoly spindle
  • Available in silver and black
  • 104BCD in sizes 170, 175 and 180mm
  • Steel pedal inserts for strength
  • Pedal washers (included) must be used at all times!
  • EB24 (BSA24) Bottom Bracket sold separately
  • Weight = 28.6oz (170mm)
  • Tighten Spindle Bolt to 2-2.5Nm
  • Tighten Pinch Bolts to 12-14Nm

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.