Hase Adjustable Length Crank Arms Square Taper
New from Hase. A fully adjustable crankset that can be adjusted in length from 65mm to 165mm in 15mm increments, without tools. This ingeniously engineered crankset lets you adjust the crankarm length with only a quick-release lever and a push-button, no shop tools necessary! Ideal for recumbent riders and riders with disabilities. Or even riders with varying leg extensions or physical builds. Also great for young riders, or if you have multiple riders riding the same bike or trike.
The square taper model (shown here) comes complete with 39 tooth chainring (4-hole 104mm BCD), chainring guard, and chainring locknut. Compatible with square taper bottom brackets.
Click on the following link for a quick video demonstration of this amazing device: Hase Adjustable Length Crank Arms Video