Max rim PSI

Chuck&Gail wrote:
I've seen folks WAY overload tires also. Doesn't make it safe. You are certainly more of a gambler than I am, running rims at 80 psi is a TWENTY THREE PERCENT OVERLOAD. Hope when a wheel blows we are not near you, you scare me.

Just saying.

I said I would like to run them at 80 psi, not that I am. I have them at 70 psi now, 8% over.

Wow, no one mentioned that if inspected by a LEO, the GVW would be calculated from the rim rating (lower) than the E tire rating (3042 lbs)

ksg5000 wrote:

Eyetattoo wrote:
So if I run them at 65 psi will that cause any tire heat issues on the E rated tire?

No

I've found that a heavy wall E tire run hotter at 65 psi than at 80 psi. May as well stick with a D tire and run max pressures. The tire will thank you.

points to ponder from the RVdoctor.com"

(snipped) Trailers are simply hard on tires and wheels. Whenever there are axles close together the lateral forces applied to the tires and wheels when turning are tremendous. This is particularly true when turning at low speeds like in campgrounds and in-town driving. Inflating trailer tires to the sidewall pressure will help them run cooler with less heat buildup as well as minimize the lateral forces applied in tight turn situations. These forces take their toll on the wheels and tires and failure will normally occur when the tire and wheel are at their highest temperature, i.e. running at highway speeds. Tires and wheels are matched to work together, in most cases this is based on air pressure ratings, if tires upgraded from an 80psi (load range E) to the 120psi (load range G) without upgrading wheels it could cause a problem. There is little one can do about the sideways forces other than to try to make as wide and smooth low speed turns as possible and avoid sharp tight turns. (snipped)

Eyetattoo wrote:
So if I run them at 65 psi will that cause any tire heat issues on the E rated tire?

No

I've seen folks WAY overload tires also. Doesn't make it safe. You are certainly more of a gambler than I am, running rims at 80 psi is a TWENTY THREE PERCENT OVERLOAD. Hope when a wheel blows we are not near you, you scare me.

Just saying.

I'd check with a reputable tire shop, but weak rims on any trailer is bad business, and a rim rated at only 65lbs is weak imo.

"SOME" 15" wheels that come with D tires are rated up to 70-75 psi. They work fine at their max psi.

I've pulled commercially for many years and its been my experience that steel wheels that are over pressured can and do split usually around the wheels bead seat flange. Older wheels with lots of use are more suspect.
I've seen aluminum wheels crack in the wells or the flange from using above recommended pressures.
IMO use the right wheel for the tires pressure and capacity ratings.

So if I run them at 65 psi will that cause any tire heat issues on the E rated tire?

What do you think they mean when they say "Maximum Pressure"? If you would read those 2 words, "Maximum Pressure", you could answer your own question.

Running 80 lbs on D rated rim is suppose to be dangerous. Putting "danger" aside running 80 lbs on rig who's weight is designed to run on 65 lbs will give you lousy ride. The max pressure on outside of tire isn't the weight that tire mfg recommends - that's based on the weight of the rig and in your case it's 65 lbs or maybe less.

I use E rated tires - D rated rims. Based on scale/weight my front tires are 48lbs and rear tire are just under 60.