So I have seen some 10spd shifters and rear derailer combo's on sale at Blue Sky Cycling. My son has a 2012 Rockhopper Comp with the 9spd setup. If I buy the SLX or XT 3X10 shifters and rear derailer combo do I just need to get a 10spd rear cassette or is more involved then just getting a new cog.
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Thread: New 9spd 2012 RH -->10spd
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