Additional 10mm travel spacers can be installed under Mastodon bottom-out bumpers to increase tyre (tire) clearance and reduce travel.
121-29113 spacer is smaller diameter used for top-out on Pro and Comp forks. Bottomout on air side of Pro forks.
121-30396 spacer is used for bottom-out on Comp fork damper side.
121-32318 spacer is used for bottom-out on Pro fork damper side and Comp fork air side.