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@melon
ive just acquired a fixed conversion with a sugino maxy 52t single chainring. its a nice bike, but i already have two fixed bikes and two single speeds. i fancy a geared bike to add to my stable.
it still has both its brakes, and i have a 8 speed wheel, so effectivly, i only need a cassette and derailleur+shifter to make it geared. but with a single front chainring.
i use a 70" gear on my FG and SS bikes, which my favourite gear to ride on. im a little unsure how i should gear a bike with only one chainring up front. a normal cassette is likely to be too highly geared i reckon, as it would have been designed to be used with the option of a lower front chainring.
should i get/build a cassette with a 70" in the middle, as its my normal favourite, and then base the other gears around it? the problem i see is that a 70" gear on a 52t up front is 20t, which is quite a large tooth gear in itself, and bigger tooth gears are kind of unusual and hard to get. and big gears like this might cause shifting problems.
what do you reckon?