Stan's NoTubes - Kit, E-Sync Os, Axle Spacer, Front, 20/15/9, Std stock The Arch MK4 is our

The Arch MK4 is our most versatile wheelset

As long time cyclists

and 6061 alloy construction

Chrome Steel cartridge bearing used in Neo hub shells

R-Evolution

Stan's NoTubes - Kit, E-Sync Os, Axle Spacer, Front, 20/15/9, Std stock The Arch MK4 is ourThis spacer is positioned between the bearings of front E sync OS hubs. Not compatible with the most common 15x110mm hub spacing. This spacer is compatible with 20x110mm, 12x100mm, 9x100mm thru axle, 9x100mm quick release, and RockShox Torque Cap 100mm E sync OS hubs. Not compatible with Centerlock or non OS versions of E sync and Neo hubs. Not compatible with M pulse hubs.