Thread: Can I replace HG20-7spd with M580-9spd without changing hubs?
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Old 09-30-12, 08:47 PM
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shelbyfv
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No. However, you can use 8 cogs of a 9 speed cassette on your 7 speed hub and shift with your 9 speed shifters. Google "8 of 9 on 7."
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