Lightweight CNC close ratio 11s cassette?
05-17-23, 07:28 PM
#51
Method to My Madness
Join Date: Nov 2020
Location: Orange County, California
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Update: Prestacycle Lock Ring Sucks
The 11-speed 12-28 cassette is still shifting flawlessly.
However, the lock ring which comes with this cassette sucks. It does not have a crush spacer behind it, and is too small for a 12T first cog, probably because it also fits an 11T first cog. So over time the lock ring (a) worked itself loose, (b) extended further outboard than the surface of the hub that goes against the inside of the dropout, and (c) got caught against a barely protruding RD hanger bolt. This caused the freehub to lock up relative to the bike (but luckily not relative to the wheel) as I was pedaling along on a descent so that I could no longer pedal or backpedal; thankfully I managed to slow down and unclip from an awkward position. Upon closer inspection, no damage to any component other than the lock ring itself.
I replaced the Prestacycle lock ring with a Shimano lock ring designed for a 12T smallest cog (part no. Y1YX98020): Shimano Ultegra CS-6700 Lock Ring & Spacer for 12T - Y1YX98020 Pit Crew Cycles.
However, the lock ring which comes with this cassette sucks. It does not have a crush spacer behind it, and is too small for a 12T first cog, probably because it also fits an 11T first cog. So over time the lock ring (a) worked itself loose, (b) extended further outboard than the surface of the hub that goes against the inside of the dropout, and (c) got caught against a barely protruding RD hanger bolt. This caused the freehub to lock up relative to the bike (but luckily not relative to the wheel) as I was pedaling along on a descent so that I could no longer pedal or backpedal; thankfully I managed to slow down and unclip from an awkward position. Upon closer inspection, no damage to any component other than the lock ring itself.
I replaced the Prestacycle lock ring with a Shimano lock ring designed for a 12T smallest cog (part no. Y1YX98020): Shimano Ultegra CS-6700 Lock Ring & Spacer for 12T - Y1YX98020 Pit Crew Cycles.
