Isn't it just that they're close together in size to limit the jumps from a wide range cassette?
TBH I thought a touring double was just the old fashioned phrase for a compact crankset. "Compact" sounds a bit sexier than "touring".
@hugo7 started
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Isn't it just that they're close together in size to limit the jumps from a wide range cassette?
TBH I thought a touring double was just the old fashioned phrase for a compact crankset. "Compact" sounds a bit sexier than "touring".