PUSH Industries ACS3 Coil Component Kit - 2014-2017 RockShox Boost 27.5 Pike/2018-Current 27.5 and 29 Pike, 160mmTransform your existing RockShox Pike, Lyrik or Yari suspension fork into the ultimate trail fork. The ACS3 coil conversion kit combines small bump sensitivity, traction, and mid stroke support of a coil with the big hit performance of an air spring. By using coil springs, you can eliminate the constant maintenance required to keep your fork running optimally! Fits 2014 2017 RockShox Boost 27. 5 Pike 2018 Current 27. 5 and 29 Pike Includes Air Bump