I have Shimano FC-MC19 22/32/42 175mm crankset on my MTB for 17 years and it's time to replace it but I find it difficult to figure out what new crankset will fit my bicycle.
Two years ago I replaced the original bottom bracket (it was 110mm) for Shimano BB-UN26 110mm and everything worked perfect.
Now, I am wondering if I purchase Shimano Acera FC-M361 22/32/42 175mm crankset will it fit on my 110mm bottom bracket??? The specs of the Acera crankset that I am considering to purchase are literally the same as of the old crankset I am replacing but the new Acera crankset says that recomended bottom bracket is 123mm.
I don't see why the new Acera crankset wouldn't work on 110mm bottom bracket as the old crankset did for 17 years!? Also, I measured the distance from the bottom of the old crankset crank arm (where the pedals are attached to the crank) to the bicycle frame (where the crank arm is the closest to hit the frame) and there is 1cm of space on both sides, so no touching should occur between crank arm and the frame even if the new crankset is mounted on current 110mm bottom bracket in my opinion.
What do you think? Should I add spacers and how many??? Would that help? I really don't want to purchase new bottom bracket if everything would work well with the current one of 110mm spindle length.