i'm mostly a denizen of the road forum however,

as a way to log extra miles and time in the saddle- i commute to work. however, due to high traffic, lack of road shoulder, curbs, medians, and crappy roads in general... i ride a mtb.

my question is- the BB width and pedal to pedal measurement of the mtb is quite a bit wider than my road bike. recently, ive noticed some knee pain.

are mtb's generally wider and there's nothing i can do- or are there narrower crank sets out there that could reduce the transition between the two bikes.

many thanks in advance in advance for constructive answers.