Mountain bikers, if your RockShox XC30 fork needs some love, this genuine replacement spring is exactly what you're looking for! This is the official RockShox part (number 11.4018.010.095) designed specifically for 27.5 inch XC30 forks with 100mm travel. The firm blue spring gives you that responsive feel you want for aggressive riding while still absorbing bumps nicely. Made from durable materials that stand up to rough trail use season after season. Installation is straightforward if you're comfortable working on your own suspension - just follow the manufacturer's guidelines or have your local bike shop handle it if you're not confident. Much cheaper than replacing your whole fork, and it'll make your ride feel like new again. Perfect for when your current spring has lost its tension or you want to adjust your fork's performance. The quality is exactly what you expect from RockShox - precise engineering that fits perfectly and performs consistently. Whether you're maintaining your current setup or upgrading your suspension feel, this spring gets your fork back in proper working order. Your bike will thank you with smoother performance on those technical trails. Keep your ride in top condition without breaking the bank on a full fork replacement!