Resistive Pedal Exerciser w Hand Pedal Pulley Exercisers It helps to set Hip Kits It helps to set exercise goals and push for them by recording real time stats of steps Replacement Caster 3 x 1 1 4 * HD Casters Have Threaded Stem For Extra Security And Safety * All Single Wheel Castes Come With Removable Bolt And Locknut Allowing Disassemlby For Easy Cleaning And Removal Of Build Up Grime Thread Or Anything Else That Your Wheel Picks Up During Normal Usage * This Caster System Will Add Longevity To Your Casters * Swivel: Double Ball Bearing With Hardened Raceways For Extra Strength * Cover: Helps Protect Swivel Bearings * Construction: Heavy Guage Cold Rolled Steel Formed For Strength Enjoy all the benefits of bicycling anywhere * Total body exerciser * Better cardiovascular health * No bulky equipment or stressing your joints * Use on the floor to exercise your feet and legs * Pedals have loops for extra security * Adjustable tension control knob *