CJ Ackley Machine Company Narrow Crank Arm Shorteners Pair

Reduce knee strain and increase cadence. Bolts into crankarm and pinches arm with adjustable cams.  Great for narrow cranks and stationary exercise bikes (may need a 1/2" adapter for stationary exercise bikes).  (Click here for normal CJ Ackley Crank Arms.)

Product Notes:

• Shortens crankarms by 24, 41, 58 and 75mm.
• Adjustable cams to fit a variety of narrow crankarm widths from 17.5 to 28.5mm.
• Compatible with 9/16" pedal threads.
• Sold as a pair - left and right side.
• Comes complete with a 6mm allen wrench and a tube of Loctite 242 to install the shorteners on your crank arms.
• Pedal wrench not included.
• 210 lb weight limit on upright bikes.  Do not stand on pedals continuously.