Can yo give some idea as to which bike you have, manufacture and model and age, as this will let us know what sort of gears you have
I've got a specialized dolce 2010. I've just been out for my first ride on it & managed the gears on the right hand, going up down them but what about those on the other side when do I use them, sorry for seeming a bit thick but I've never had much to do with the workings of bikes (& I know I'll have to).
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