Serfas E-GEL Hybrid Saddle Steel Black closeout 160mm and 165mm rotors are

160mm and 165mm rotors are not interchangeable

Worn on the forearm

The trainer’s smart electronics then control resistance in a progressive power curve

Supported shoulder knobs provide precise cornering performance

Serfas E-GEL Hybrid Saddle Steel Black closeout 160mm and 165mm rotors areFeatures a friction free E GEL layer designed to behave as a second skin and reduce chafing by moving with the motion of the rider thus reducing uncomfortable friction. Also features Serfas Deep Groove Design central pressure eliminating channel, Dual Density Base, four way stretch moisture wicking Lycra cover, elastomer rear suspension, and heavy duty steel rails. Dual Density Base Deep Groove Design Elastomer Rear Suspension Friction Free E Gel