Indoor Cycling

- Giant road thru-axle trainer axle - Alloy construction - For use on 2017+ Giant road bikes with a 142x12mm rear thru-axle

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