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50/34 which is currently fitted on the bike is MA
52/36 is MB
Does this mean that any attempt to 'change up' from the British Cycling U16 reg meeting 36T ring to the 50T will result in chain mangling?I'd be pretty relaxed about that, but then I grew up in an era when double chainrings were a novelty and they certainly didn't have any ramps/pins/lowered teeth. Using a 36 with a 50 might take you back to shifting that's only as good as the previous component generation, not the previous millennium. 36 officially works with either a 46 or a 52 anyway, so the synchronisation can't be that critical.
gbj_tester-
Thank you for that re-assurance.
I had a 10-speed, (2 x 5), moment recently,
pulled away from a set of traffic lights,
and in a moment of relaxation/day-dreaming/distraction,
'automatically' reached for the down tube shifter,
which of course wasn't there!
(Apart from a couple of miles on mespilus jr's 653/friction 105
I haven't ridden a bike with down tube shifters since the early '90s).
mespilus
Looking for the (supposedly) simplest solution,
I now run into the Shimano MA, MB etc designations,
50/34 which is currently fitted on the bike is MA
52/36 is MB
Does this mean that any attempt to 'change up' from the British Cycling U16 reg meeting 36T ring to the 50T will result in chain mangling?
Won't be a problem on the Hillingdon track as the larger ring will be 'locked off'.