Is 1/2" leaf spring relocation worth the trouble?

72bluNblu said

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So that's actually a pretty wide 315. Compared to the 295/40/18 Falken's I run (on the back) which are listed as 11.8" section and 10.5" tread width those 315's would be .8" and 1.2" wider respectively. But that's what they would be mounted on an 18x11, not an 18x10. I'd bet he's loosing at least a 1/2" of section width because of that.

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Nice! Your googlefu is much stronger than mine. :D

Years ago I read "The industry rule of thumb is that for every 1/2" change in rim width, the tire's section width will correspondingly change by approximately 2/10"(5mm)."

Based on that, his section width would be about 12.2". I assume the tread width doesn't change much though?

My benchmark for a tire that exceeds the expected specs is the RT660. A 295/30R18 in brand would be 12.1/10.8. So the section width of the 315 on that 10" tire wouldn't be really any larger, but the tread width would be almost an inch more, assuming tread width doesn't change when the tire is squeezed on a smaller rim.