I searched on tirerack.com for 205/75-15
Up comes: BFGoodrich Radial Long Trail T/A (Highway All-Season)
But the description page says it's a light truck tire. The load rating (1609 #s) is the same as for all the car tires on the same results page. Why is it a truck tire?
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Here's part of your answer:
Tire Size Service Description Sidewall MSPN Rim Width Range (inches) Section Width on Measuring Rim Width Overall Diameter Tread Depth (in/32nds) Revs/Mile at 45 mph Max Load (lbs@psi) Original Equipment LT225/75R16/D 110R ORWL 43427 6 - 7 9.1 on 6 29.5 14 704 2335@65 LT245/75R16/E 120R ORWL 66303 6.5 - 8 10.1 on 7 30.7 14 677 3042@80 P265/70R16 111T ORWL 88357 7 - 9 10.6 on 8 30.6 11 686 2185@35 * N P265/65R17 110T ORWL 94178 7 - 9.5 10.5 on 8 30.4 11 686 2125@44 * N P265/60R18 109T ORWL 91173 7 - 9.5 10.2 on 7.5 30.6 11.5 685 2065@35 * F P265/60R18 109T BSW 27971 7 - 9.5 10.71 on 8 30.51 11.5 685
2065@35 * NLook at the weight ratings: 2335 lbs PER TIRE.
On the Michelin LTX tires I usually buy I think the main difference is the LT tire has an extra sidewall.
Sounds about right. Might also have more actual tread plies as in days of old (most modern tires have a "ply rating"), a bigger bead, or stronger construction in general -- things that give it more ability to carry a heavy load, and/or take a pounding, possibly at the expense of high speed ratings or handling.
The recommended range of air pressures for various situations might be a good bit higher as well.
--Joe
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