Product Description The Ramp Control upgrade cartridge from MRP allows you to adjust the spring characteristics of your Fox or RockShox suspension fork. You can also change the progressivity without having to disassemble the fork and install tokens. This not only makes it easier for you to find your optimum setting, but you can also adapt it to the trail ahead. Features:enables adjustment of the basic spring characteristicthreaded base with interface for Huck-Puck volume spacerthanks to Ramp Control, uncomplicated adjustment of the spring behaviour at high speed and at the end of the suspension travelramp control adjustment possible on the move and without toolsfine-tuning of the bottom-out with only minimal change in spring behaviour at the beginning and in the middle of the suspension travelsimple assemblyModels:Fox Racing Shox F: Compatibility: Fox Racing Shox 36 Float from model 2018 with FIT4, RC2 or Grip shock, recommended for 140 - 180 mm travel in 27.5" , 27.5+ or 29"Marzocchi Z1 2019 - 2020 modelsManufacturer Number:WB-19-2115 Rock Shox 35 B: Compatibility: recommended from 140 mm travel in 27.5" , 27.5+ or 29"RockShox Pike Boost as of 2015RockShox Pike as of model 2017RockShox Lyrik as of model 2017RockShox Yari as of model 2017RockShox Revelation 35 mm as of 2017Manufacturer Number:WB-19-2114Note from the manufacturer:The Ramp Control PRO upgrade cartridge is not suitable for RockShox Dual Position Air forks. Contents:1 x Manufacturer: MRP 580 N. Westgate Dr. Grand Junction CO 81505 USA info@mrpbike.com Distributor: everyday26 Siedlerstr. 22 84109 Wörth Germany info@everyday26.de