At a full quarter inch wide (6.35mm) at the splines, Kick-Ass-Cogs simply will not damage your free hub body the way a narrower cog can. Made of high strength 7075-T6 alloy (Stronger and harder than most common steels), Kick-Ass-Cogs are precision machined insuring perfect axial and radial alignment that compliments the superior chain lines that cassette style hubs allow.
The specially engineered tooth profile on Kick-Ass-Cogs improves both cog and chain life while minimizing drive train friction. With a Kick-Ass-Cog on your bike, you can expect a smooth, quiet drivetrain for miles to come. We do not recommend ACS Crossfire or SRAM PC1 chains as they accelerate the wear on the cog. SRAM PC7X and geared chains have showed no issue.
Like all EndlessBikeCo. Products, Color Anodized Kick-Ass-Cogs are made right here in Western North Carolina; not in some faceless factory on the other side of the planet.
Please note that not all freehub bodies are created equally (outside diameter that is). Depending on your particular hub choice, you may have to modify your Kick-Ass-Cog however with this modification they will fit on all Shimano style freehub bodies. We like our cogs to fit tight so there is only smooth in your drive train with no damage to that expensive freehub body. Not sure what we mean? email us firstname.lastname@example.org