I’m running SRAM Red eTap with an 11-30 cassette (supposedly only supports 11-28, but got it to work). I’m planning to do a bunch of big climbing events and quite frankly I just don’t have the power to do multiple hour-long climbs near threshold. So I’m looking for options to get a bigger cassette.
Can I get a derailleur hanger and fit a 34 or 36 tooth cassette? I guess I would need a longer chain, but can I do this without replacing the derailleur?