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Old 03-03-09, 12:01 PM   #1
pyze-guy
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Poad casette on mtb

I switched 8 speed casettes from mtb to road. It is a mtb and haven't changed the chainring size. Both casettes start at 12 teeth. Question I have is should the chain be shortened at all?
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Old 03-03-09, 12:09 PM   #2
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Only if the big cog is much smaller. Check by putting chain on big ring and big cog (cross-chain), and see how much slack there is.
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Old 03-03-09, 12:13 PM   #3
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Only if the big cog is much smaller. Check by putting chain on big ring and big cog (cross-chain), and see how much slack there is.
Cool. They are different sizes. Any rule of thumb to how many links to remove? Does it go by tooth difference or is it an eyeball it type of thing?
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Old 03-03-09, 12:22 PM   #4
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Cool. They are different sizes. Any rule of thumb to how many links to remove? Does it go by tooth difference or is it an eyeball it type of thing?

General rule of thumb is loop big ring front, big ring rear, and add 2 links.
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Old 03-03-09, 07:03 PM   #5
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On my B'stone MB-3, I have a wheelset for road with a 12-23 and a mountain wheelset with a 13-30 cassette and interchange between the two with no ill effects chainwise.
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