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This fine pair of Surly 10/12 Adapter Washers is designed to adapt any 135, 170, or 190mm O.L.D. QR axle hub with a 142, 177 or 197mm spaced thru-axle frame. Make sure the QR axle on your wheel is the right length for the frame spacing. For instance: 190mm OLD QR goes with 197mm thru-axle spacing.

Surly wants you to be able to set up you ride just the way you want it. This pair of adapter washers make it so you can throw your favorite 135, 170, or 190mm O.L.D. 10mm solid axle hub into the rear end of a 142, 177, or 197mm spaced thru-axle frame. Add the adapters, add the wheel, install and tighten the nuts and, bam, you're ready to rip. Make sure the solid axle on your wheel is the right length for the frame spacing. For instance: 190mm OLD QR goes with 197mm thru-axle spacing.

Surly Singleator mounts right up to your derailleur hanger and provides a simple, effective, and adjustable means of tensioning the excess chain slack found in vertical dropout single-speed drivetrains. - Triple-sealed spring, large cog capacity and chain guides - Stainless steel pivot bushing - Includes two springs for upward or downward tension adjustment - Do not use with a coaster brake, fixed gear, multi-cog or multi ring drivetrains