Track cranks are narrower, but only in the sense that your pedals end up being closer together; i presume this is to help cornering. Also, they can afford to be narrower due to the rear dropout spacing being 120mm, compared to road frames which have 130mm spacing (meaning wider chainstay).
Track cranks are narrower, but only in the sense that your pedals end up being closer together; i presume this is to help cornering. Also, they can afford to be narrower due to the rear dropout spacing being 120mm, compared to road frames which have 130mm spacing (meaning wider chainstay).
other than that, what hippy said.