Cassette Cog mirror and the VaporFit™ system adjusts

and the VaporFit™ system adjusts like a halo around the skull

It has a knurled clamp area and is made from durable 4130 Chromoly steel

The exclusive ATAC clamping system offers very easy engagement

12” push button wheels quickly install

Cassette Cog mirror and the VaporFit™ system adjustsDescription Surly's cassette cogs are designed first and foremost for singlespeeding, but being that they're Surly, they bumped up the versatility a bit. At the base, the cogs are 4. 35mm wide, which allows you to stack a few of them up for a simplified multi speed drivetrain. Use a 9 speed derailleur if you do that. Features Machined from SCM415 Chromoly steel Heat treated and chrome plated Compatible with 6 to 9 speed 3 32" chains Available in