Alloy Rear Disc Brake QR Hub 6-Bolt 32 Holes 135mm 36.8mm 11-12 speed HG New
HG36.8mm was introduced in 2012 when Shimano introduced the 11 speed DuraAce groupset. The spline pattern is the same as HG35mm but, you guessed it, 1.8mm longer. Most (but not all) 11 speed Shimano road and gravel cassettes require an HG36.8mm freehub body. All Shimano 12 speed road (but not mountain bike) cassettes also need an HG36.8mm freehub body.
