I have short horizontal drop outs. 42x16 fits perfectly in the middle of the dropout, but that gearing seems to low. I have an opportunity to trade my 16 for a 15 with someone but i don't know if i have enough space to do it without having to start messing with the chain length and possibly having to buy a half link. can you guys tell from your wealth of experience if i can get away with it without changing the chain length?
Thanks