RockShox Boxxer D1 DebonAir+ w/ ButterCup Air Spring Upgrade Kit - 180mm, Boxxer 38mm (2024+)

The new DebonAir+ is built to strike the perfect balance of what riders really want: butter-like small bump feel, increased air volume to add support throughout the travel and higher overall ride height for more confidence when things get steep. This upgrade is for those who have 2023+ ZEB, Lyrik and Pike Select+ or Select models, or pre-2023 model Zeb forks.

By focusing on refining the shape of the spring curve, RockShox created an air spring that’s more plush off-the-top, with a supremely supportive mid-stroke and improved end-stroke ramp up. They zeroed in on details to improve small bump absorption to be extremely reactive over every inch of trail and added mid-stroke support allowing the fork to sit higher in travel and utilize every millimeter of travel. The new DebonAir+ offers a supreme ride feel and consistency you can trust.

Buttercups Little gold-packaged rubber pucks live at the end of the damper and air spring shafts and fit into the lower leg of the fork. Similar technology is found in off-road vehicles, chainsaws, and most devices that transfer high-frequency vibrations into the hands and arms of the user. Like a rubber mount on the handle of the chainsaw, ButterCups measurably eliminate trail chatter by on average 20%. Proven by data acquisition over thousands of trail miles and confirmed by riders. Featured in all Ultimate models and upgrade-able in the full line up of new Pike, Lyrik, and ZEBs.