Lyrik E1/ZEB B1 Air Spring

This RockShox service kit replaces the air spring bottom out hardware in Lyrik E1+ and ZEB B1+ forks from the 2027 model year onward. It combines the ButterCup assembly with the Adjustable Bottom Out bumper, so a single part covers both the isolation of high frequency input at the spring end and the tuning of end stroke behaviour.

The ButterCup sits at the base of the air spring assembly and isolates high frequency chatter before it reaches the crown and the rider's hands. The Adjustable Bottom Out bumper lets a rider set how firmly the fork resists the final part of its stroke. Fitting the kit calls for a full air spring service.

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