Okay tire experts what gives here??? - Lateral-g Forums

Vegas69 · #1 10-25-2011, 04:23 PM

I've run both on my car, they both fit fine on a 12" rim. Mounting will suck in that bfg.

Payton King · #2 10-26-2011, 05:53 AM

mounted on a 12.5 rim and I am about 14.00 at the sidewall bulge each side.

That is suprising though

James OLC · #3 10-26-2011, 07:15 AM

I'm trying new tires on the '67 and close to the same thing.

Old - 325/30-19 have a 13.0" section width with 11.6" tread
New - 305/30-19 have a 12.3" section width with 12.1" tread

Different tires from different manufacturers have different shapes (i.e. shoulders, sidewalls, etc.) and can measure up differently. Also - section width sizes are based on mounted tires on the manufacturers specified rim size - it's really hard to see whats what with them unmounted. For what it's worth on the same width rim your tire should be a quarter inch wider at the sidewall with a half inch more tread.

**parsonsj** · #4 10-26-2011, 09:04 AM

For even more fun, try and comprehend the differences between tread wear ratings.

LS1-IROC · #5 10-26-2011, 09:25 AM

Definitely pays to do your tire research before buying a particular brand if you after a certain tread width. If you browse through different forums you will start to see trends on tire sizing.