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@dancing james
What ultegra rear 10spd mech do I need for the commuto x bike.
I have DA 7800 shifters, an ultegra 6750 50/34 crankset and an 11/28 cassette in the parts bin.
Most of the time the bike will be used on the road and for carrying stuff. But there may be times when I want to drop the gearing a little lower. It looks like changing to some smaller chainrings might be an option.
So what rear mech should I go for, and what options do I have for chainrings for offroad or carrying loads up hills etc?
I am terrible at working this stuff out, I think 50 + 28 - (34 + 11) indicates I need a rear mech that can take up 33 t, but if I am to run a lower gearing, what are the options, and is there a rear mech that can do it all for me?
Should I just go for the Ultegra medium cage mech (i can't find an ultegra long cage) or should I look at a 105 or is there another mech I should consider?