MRP Better Boost Hope Pro 2 And Pro 4 Hubs Upgrade Your Bike Boost spacing is a great way to improve your performance. If you want to upgrade your fork to a Boost fork, but still have a non-Boost hub, you can easily add an adapter. The MRP Better Boost Endcap Kit allows you to upgrade your existing 15x100mm front wheel to the Boost 15x110mm fork standard. This kit maintains the existing dish of the wheel by shifting the brake rotor outboard. It features two precisely machined end caps and a brake spacer with bolts. Features Upgrade your existing 15x100mm front wheel to the Boost 15x110mm fork standard Maintains the existing dish of the wheel by shifting the brake rotor outboard Compatible with all Hope Pro 2, Pro 2 Evo, and Pro 4 mountain bike front hubs with 6-bolt disc mounts | Mrp | Sus Better Boost Hope Pro 2 And Pro 4 Hubs Boost Endcap Kit