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

tooblue · #1 10-25-2011, 03:51 PM

Are his tires mounted on a wheel and aired up?

SLO_Z28 · #2 10-25-2011, 04:02 PM

Different manufactures have different sizes for the same tire size. 265/40/17 hoosier A6's are wider than 275/40/17 Nitto NT05's that are as wide as 295/40/17 HTRZ2's. Ran into this all the time selling tires, no 2 brands are exactly alike.

**DOOM** · #3 10-25-2011, 04:10 PM

Quote:

Originally Posted by SLO_Z28

Different manufactures have different sizes for the same tire size. 265/40/17 hoosier A6's are wider than 275/40/17 Nitto NT05's that are as wide as 295/40/17 HTRZ2's. Ran into this all the time selling tires, no 2 brands are exactly alike.

James I understand what your saying but to me this is a bite rediculous! Almost unexceptable..

**DOOM** · #4 10-25-2011, 04:07 PM

Quote:

Originally Posted by tooblue

Are his tires mounted on a wheel and aired up?

No unmounted

Mayhem · #5 10-25-2011, 04:16 PM

Some tire manufacturers measure the treadwith at the actual treadwidth and others measure at the sidewall even though they sell them as the same size tire.

I got a set of cheap 255 50 17 for my Impala SS to replace the BF Goodrich tires (measured at treadwidth) the cheapies were measured from sidewall and looked god awful, and tiny. Learned that lesson. I always check now.

Vegas69 · #6 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 · #7 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 · #8 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** · #9 10-26-2011, 09:04 AM

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