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New cassette - chain length

Old 11-13-16, 05:56 PM
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New cassette - chain length

I am switching from a 12-32t cassette with a medium cage Sram Rival derailleur to a 12-28t cassette with a Sram Force short cage derailleur. My chain is relatively new and in good condition.

Should I remove 2 links (1 couple) from the chain to accommodate the smaller cassette and the short cage derailleur? Or will my current chain length - for the 32t cassette and medium cage derailleur - be fine?

Thanks!

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Old 11-13-16, 06:00 PM
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Why the derailleur change?
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Old 11-13-16, 06:10 PM
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Wanted to upgrade to Force and live in a relatively flat area - so decided I didn't need the medium cage for the extra 4 teeth.
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Old 11-13-16, 09:24 PM
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Try shifting to small-small and see if the chain is completely slack with the new cassette and rear derailleur. If it is and removing 2 "half-links" will correct it, then do so. If the chain still has even slight tension, don't bother.

This assumes you can safely shift into big-big with your current setup. Be absolutely certain you can.
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Old 11-13-16, 10:35 PM
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Originally Posted by franklinr
I am switching from a 12-32t cassette with a medium cage Sram Rival derailleur to a 12-28t cassette with a Sram Force short cage derailleur. My chain is relatively new and in good condition.

Should I remove 2 links (1 couple) from the chain to accommodate the smaller cassette and the short cage derailleur? Or will my current chain length - for the 32t cassette and medium cage derailleur - be fine?

Thanks!
Been discussed at length here:

https://www.bikeforums.net/bicycle-me...in-length.html

I use the "large-large" method and have no problems. However, I'm pretty sure I went from a 12-28 to 12-32 without changing the length.
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Old 11-14-16, 06:18 PM
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so there is no yes or no answer? Best bet is to throw the new mech on, install chain, and test it out. My gut says to remove 2 links since I'm moving down to a short derailleur. Less capacity to accept chain.
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