PRODUCT DESCRIPTION The Gel Block riser for trainers cradles and elevates the front wheel off the ground. The Elastogel insert ensures maximum stability for the front wheel and absorbs vibration for greater comfort. Keep your bike stable while riding on your indoor bicycle trainer with this Elite gel riser block. An indispensable accessory for cyclists, the gel block features nonskid rubber on the bottom and an Elastogel insert, so that your front wheel stays stable and secure at all times.