RockShox BoXXer D1

The BoXXer D1 is built specifically for elite downhill racing and aggressive bike park riding. Its 200mm of travel and stiff 38mm chassis are engineered to handle high-speed impacts and technical terrain that would overwhelm standard trail forks.

The DebonAir+ system is designed to mimic the linear, supple feel of a coil spring while retaining the weight savings and tunability of an air spring. It provides excellent small-bump sensitivity at the start of the stroke while maintaining consistent support through the mid-stroke.

ButterCups are small rubber pucks integrated into the damper and air spring shafts. They are designed to filter out high-frequency trail chatter before it reaches your hands, significantly reducing arm pump and fatigue during long, rough descents.

Yes, the Charger 3 RC2 damper allows you to independently tune high-speed compression, low-speed compression, and rebound. This level of adjustability lets you dial in the fork's performance to match specific track conditions and your personal riding style.

This fork is designed for downhill frames with a 1-1/8 inch straight steerer tube and requires a 20x110mm Boost thru-axle. It is compatible with 27.5-inch wheels and supports disc brake rotors up to 220mm, so ensure your frame and hub spacing are compatible before purchasing.

The fork is designed with premium fender compatibility, but a fender is typically sold separately. You can easily mount a dedicated bolt-on fender to the integrated mounting points on the lower legs for better mud protection.