Inflating tires 10lbs over?

NC Hauler wrote:

AH64ID wrote:

Old-Biscuit wrote:

AH64ID wrote:
Quite a few people commenting in this thread that should read the service buletien from Goodyear before they comment on Goodyear ST tires.

AFIK Goodyear is the only only with a bulletin allowing pressure to go higher than the sidewall rating and faster than the ST standard speed limit of 65.

Goodyear doesn't state 'sidewall pressure'
They state 'trailer placard for normal inflation and load conditions.

Cold MAX PSI on sidewall is just that.........MAX PSI COLD Inflation



If Goodyear tires, with the ST designation, are used at speeds between 66 and 75 mph (106 km/hand 120 km/h), we recommend the cold inflation pressure be increased by 10 psi (70 kPa) above the recommended pressure based on the trailer placard for normal inflation and load conditions

It doesn't state do not exceed max side wall pressure at all!

It's very simple actually. 10 psi above the required pressure for normal load and inflation. If the tire holds 2540 @ 65 psi then you can go to 75 psi for 2540 lbs at 75 mph. That is 100% inline with the buliten and no interpretation is required .

If they didn't want you to exceed sidewall pressure it would state increase the cold psi up to sidewall max pressures, but it doesn't.

I have never seen a trailer with a different load sticker than the OEM tire load and sidewall numbers. My OEM tires were marathons and the trailer sticker matches the sidewall, meaning 75 psi if you go by the Goodyear information. Like I said, ZERO interpretation required.

If tire states don't exceed max cold air sidewall pressure of ( fill in the blank), I'm not going to air above that. If tire states max speed at (fill in the blank), I'm not going to exceed that either. I'm not going to add another 10 psi so I can go 10 more mph faster than tire recommends on the sidewall, unless additional information on that subject is also included on the sidewall of said tire., doesn't make "safety sense to me, but that may just be me.

I've read where, if trailer is going to SIT for a while, add 5 to 10 psi to the tires in that case.

If one is going to go 10 mph continually over tires recommended speed rating, I'd purchase a tire that can do the speed without exceeding recommended max cold air sidewall psi.

That's 100% your choice as the consumer; however, the sidewall data and the bulletien came from the same place.. the tire manufacturer. Both should carry the same weight.

Often times there are bulletien a, white papers, engineering releases, etc that supercede the data at the time of manufacture. Data changes, it's as simple as that.

I ran Marathons for 7 seasons on 2 different trailers. I had zero speed related failures with them and would drive at speeds of 70-75 them a couple times a year, sometimes all day long in 90° plus temperatures. I have since switched to a LT tire but not for the speed rating.