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Old 04-03-20, 11:05 AM
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base2 
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Your small/small combination is the same with new/old. After that it is a matter of derailleur capacity. Long cage Ultegra should still be within limits. If you are using medium cage it is beyond limits, but only because the limit is the 28 tooth cog. It'll still run fine on a 30 tooth cog.

If you have a medium cage and want to go beyond 30 teeth, you may want to consider the long cage.

...And the advice to change the chain when doing cassettes is pretty solid. The more worn the stronger that advice is. If all is new-ish (less than 500 miles) I wouldn't be too concerned though.
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