A Rock Crusher in HO Scale - the MRH Forum
The smaller tires on Roco's 2.5 ton trucks fit in line sizewise with that chart whereas there was a long string of trailers listed with 9.00x20" tires; WWII side of things, the 9x20 was likely used under this crusher. I reckon the absolute correct tire under this is a 10x20" but it's not bothering me much.