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All I can find is expensive or really cheap (mystery brand) is there a particular model I should look for?
@Scilly.Suffolk I think you may be onto something but gf is not convinced... Having ridden hire bikes with grip shifts she is pretty convinced the within reach from her grips is ideal.
I remember having thumbies on a mtb as a kid and didn't think they were too awkward, they were indexed though...
Would old Shimano 6 speed thumbies work with the indexing on the right hand & campag rear mech, could just run friction for front of course... I don't understand all the different pull ratios etc or when they came about.
TM-
I've got some 6 speed gripshifters, but the front is also indexed and for a triple.
They were hooked-up to a no-name RD, almost certainly Shimano spec, so I doubt they'd work with a Campag RD.
You'd have to check cable-pulls: the Shimergo thread on CTC seems to be the go-to resource on such things.
A Shimano RD is likely the least painful option, whatever shifters you use.
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If you (or she) can deal with the cheap looks and cost, the SunRace stuff is fine.
Scilly.Suffolk
withered_preacher
Cheap and reliable define thumbshifters.
That said, just get the cheapest shimano one that works.