Can I run ButterCups on one side only? Yes! For example, if upgrading from a base-level BoXXer without ButterCups to the DebonAir+ air spring or Charger 3 RC2 damper with ButterCups, they may only exist on one side. Related articles What can I upgrade on my 2024 BoXXer to make it more like the BoXXer Ultimate? How do I add ButterCups to my base-level BoXXer? Are any technologies in the new BoXXer compatible with previous generations? Can I buy ButterCups aftermarket and add it to my existing RockShox fork? Can I upgrade my current BoXXer with the Charger 3 RC2 or DebonAir+? How do I know if my RockShox fork has ButterCups?