21t

At a full quarter inch wide (6.35mm) at the splines, Kick-Ass-Cogs simply will not damage your HG 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 …