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what defines which combo can or cannot be used?
Front dérailleur is the main thing. Road fronts these days are mostly designed for a maximum difference of 16T, don't really have a minimum difference, but do like the big ring to be big.
Any combination of 32/34 inner and 46/44/42 outer will work, but at the lower end of the scale of outers the tail of the dérailleur cage will be a long way from the ring diameter so upshifts will be slow.
gbj_tester
Hi everyone,
N00b question on road doubles. So common chainring combos are 53/39, 52/38, 50/34 and 'cyclocross' 46/36. Some manufacturers would also use 48/34 (came stock on my AWOL for example). Here's the question - what defines which combo can or cannot be used? I'm thinking of using double with 34/32 inner and would like to understand if 46/44/42 can be used as an outer?
Thanks