Optimize your RockShox coil shock performance with these metric coil springs, available in various sizes and spring rates from 250-650 lbs. Designed to help you set the correct sag and fine-tune your shock's compression and rebound settings, these springs ensure the perfect ride. Ideal for riders seeking a different spring rate for their factory RockShox coil shock or needing a spring for their aftermarket shocks. These springs are exclusively compatible with RockShox coil shocks, featuring a 39mm internal diameter for a precise fit.