daft question(s)?

stumpy paul

:oops: that I don't know the answer to this so......

Can I run a Sram pg 1070 cassette 12-26 on my current ultegra setup without changing anything such as indexing?

Will the chain stay the same length as for my current 12-25 cassette?

Thanks in advance............

Butterd2

They should be compatible yes, but why are you changing the cassette? If it is worn the the chain is certainly worn too and will slip on a new cassette. If the chain is still good then it should be ok at the same length.
I would expect to have to tweak the indexing but that's easy enough.