Gusset Micro 1er Single Speed Conversion, 12/13t: Micro-1er now available for a compact one speed drivetrain Converts any 8-9sp HG splined cassette hub to a single speed. Includes 2) deep tooth CrMo steel 3/32" cogs, 1) 14mm spacer, 1) 19mm spacer and a lockring.
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