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The bottom one stock is 13t as opposed to 11t from the hope/standard 105/ultegra/DA
The bottom one stock is 13t as opposed to 11t from the hope/standard 105/ultegra/DA
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giofox
yetidamo
Works perfectly. Just with less friction.
The standard grx jockey wheels are the same size. AFAIK it's only the 12 speed mtb shimano rear mechs that use oversized jockey wheels as standard.