CJ Ackley Machine Company Narrow Silver Crank Arm Shorteners Pair
Reduce knee strain, hip strain and increase cadence with the CJ Ackley Crank Narrow Arm Shorteners in silver. These shorteners reduce the amount of bend in your knee, making it easier for you to pedal a bicycle or recumbent trike. Great for people who are under 5' 4", people who have bad knees or hips, people recovering from hip or knee surgery or going through physical therapy.
The shortener bolts into the crank arm, where your pedal normally goes, and pinches the crank arm with adjustable cams. Great for narrow cranks and stationary exercise bikes. Use the CJ Ackley Machine Company 1/2" or 20mm Fastening Bolt Kit for Threaded Crank Arms for 1/2 inch pedal threads or for stationary exercise bikes with 1/2 inch pedal threads.
Click here for an assortment of CJ Ackley Crank Arm Shorteners that we offer.
Specifications:
- 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 or you will break the shorteners.