L60 can very in size as well, from manufacturer to manufacturer. I have a set of Mickeys that are considerably wider (tread) than my Cobra 275s and I have a set of Remingtons that are pretty close to the 275s. Best to check the stats of the tire you are interested in. Both L60s are on 10 inch rims while the 275s are on 7s, would be better on 8s. The rim size will cheange the cross section but not the actual tread wideth.