For a stable, worry-free ride with any rear wheel-mounted trainer. Unique 3-level design lets you select the level of difficulty.

Product Features: 

·         For a stable, worry-free ride with any rear wheel-mounted trainer.

·         Unique 3-level design lets you select the level of difficulty.

·         Stack two blocks to simulate climbing workouts. 

Specifications:

Three different positions to raise your front wheel and simulate hill climbs

·         2.1 inches (5.3 cm)

·         2.7 inches (6.8 cm)

·         3.1 inches (7.9 cm)