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trek 1.2 9speed transmission

paul.kpaul.k Posts: 90
edited February 2010 in Workshop
i have a trek 1.2 2010 model ( unmodded )which comes with 9 speed sram pg950 on back think its a 27 although trek list 26, with tigra mech,and sora levers, will this be able to change to 10 speed if i get a ten speed cassette and narrower chain any advice ,cheers


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