I am looking at grabbing a used DJ bike. I see almost all are single speed. If I were to pick one up that is single speed and convert it to 1x9 what would I need?
I know shifter, rear derailleur, cassette, most like new chainring but would I need to replace my rear wheel or Hub to fit the cassette?
Mtbr's 2016 Winter Biking GearReviews and Roundups
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