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Redline Microline Crank Arms

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About This Product: Redline Microline Crank Arms

SPINDLE FIT: For square spindle bottom brackets only
MATERIAL: Forged 6061 aluminum
BOTTOM BRACKET: Sold separately
CHAINRING: Standard 5-bolt chainring (110mm bolt pattern)
PEDAL FIT: 9/16" (standard for 3pc cranks)
INCLUDES: Right and Left crank arms

J&R Helpful Hint: Most bikes will require a 113mm length bottom bracket spindle when using Redline Microline crank arms.  You can typically use the standard (short) chromoly or alloy chainring bolts (Profile and some stock gears will require longer chainring bolts).  You will need a crank arm puller that is designed for use with a square bottom bracket (the Park CCP-22 is the best on the market).

130mm: 14.9oz/422.4g
135mm: 15.4oz/436.58g
140mm: 15.8oz/447.9g
145mm: 16.35oz/463.5g
150mm: 16.5oz/467.76g
155mm: 16.1oz/456.4g
160mm: 16.55oz/469g
165mm: 16.75oz/474.8g
170mm: 17.05oz/483.36g

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.