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Thank you for your prompt answer.
looking at the frame, a Cube Agree,
the chain stay looks as likely to be snagged as the seat stay.I guess that Shimano don't offer a 36t chain ring as the inner of a double,
allowing the 50T outer to be locked off?
mespilus-
I guess that Shimano don't offer a 36t chain ring as the inner of a double,
allowing the 50T outer to be locked off?I thought 52/36 was all the go with the hipster-roadies these days. Which cranks do you have? Should be pretty easy to get a 36 for either 110mm 5-bolt or the new 6800/9000 pattern, Shimano do a 36T for 4-bolt 110mm and there are millions of possibilities in 5-bolt 110mm, since it actually is one of the few genuine standards in cycling gear.
gbj_tester
If you have 11-speed shifters, you're stuck with 11-speed cassette spacing. Oddly, Shimano have abandoned junior gearing for 11-speed, they always used to make Ultegra cassettes with big sprockets at the top end.
I think that could be assembled from an 11-28 and an 11-32, you'd need a spacer between the lock ring and the 16T to take up the slack. With some frames, you may crash the chain into the seat stay by using such a large sprocket. It's probably easier just to leave things as they are.
The other option is a 1×11 set up - 36/11 gives a development of fractionally under 6.93m with 700×23C tyres.