FOOT GYM 58mm 5-BOLT Specifically designed for covering the

Specifically designed for covering the smaller chainrings on 64BCD position

anti-vibration and allows the rider to keep the best position on the saddle

steel axle and aluminium chainrings off substantial stiffness and excellent power transfer

Heavy duty single speed chain for track bikes and Fixies

FOOT GYM 58mm 5-BOLT Specifically designed for covering the7 Foot & Ankle exercises in one device Strengthens muscles & increases stability Treats Plantar Fasciitis, Achilles Tendonitis, & foot pain Rehab for injury or for post surgery recovery Removable ice or heat massage roller 3 different level resistance bands Non slip and antimicrobial foot pad