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"Brought my Ultegra Di2 rear mech back to life"
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Overall rating: 5.0 / 5 from 3 reviews.
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"Brought my Ultegra Di2 rear mech back to life"
"Upgrade from roller to ceramic bearing for a 105 pulley"
"Lovely little upgrade from 105 to Ultegra jockey wheels. Smoother running chain and crisper shifts"