• For a stable, worry-free ride in any rear-mounted trainer
• Unique 3-level design lets you select the level of difficulty
• Stack two blocks to simulate climbing workouts
• Injection-molded construction is virtually indestructible
• Use 2 blocks for 12 different adjustment levels• For a stable, worry-free ride in any rear-mounted trainer
• Unique 3-level design lets you select the level of difficulty
• Stack two blocks to simulate climbing workouts
• Injection-molded construction is virtually indestructible
• Use 2 blocks for 12 different adjustment levels