Stan's No Tubes 1.8mm Cassette Spacer Silver

- Replacement freehub bodies include pawls and springs pre-installed
- M-Pulse hubs: six pawls are equipped with Neodymium magnets engaging every 1.66 deg
- E-Sync hubs: fast 8.18 deg engagement with reinforced high-torque pawls
- HG 11sp road FH body