Mirage Crank Shortener Set. - Suitable for reducing the distance between the bottom bracket and the pedals - This set contains a left and a right crank shortener - Including bolts Instructions for use: 1. Remove pedal from crank 2. Place the crank shortener on the crank 3. Turn the pedal onto the crank shortener Material: Steel Weight: 236 grams Total length: 7 cm Hole distance: 23 mm (center to center) Color: Silver Suitable for axle size: 9/16 inch