CeramicSpeed OSPW upgrades new Dura-Ace R9200 12-speed with Oversized Pulley Wheels
Just as the new 12-speed Dura-Ace R9200 groupset starts to actually turn up in bike shops and on the occasional top-tier bike, CeramicSpeed is ready with an OSPW upgrade to make your new 12-speed Di2 rear derailleur faster. Apparently, they’ve been running around like crazy since the new semi-wireless 2×12 groups were introduced just over
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