Tire Temperatures

First question would be whether you have measured the effective rolling diameter of the inner (Goodyear) vs outer (Bridgestone). If the inner tire is larger, therefore carrying more of the load it will be warmer.

Also, inner tires, because of less air circulation DO run warmer than outers.

The answer as to "how hot" they can get-- tire engineers I have read suggest this is really not an issue-- even 140 not being excessive. Sure, will accelerate wear, but not dangerous. Their basic answer is to run the correct PSI (checked cold) and don't worry about temperature.

I would guess that a newer tire, with more tread and softer rubber, would shed heat better than an older tire with less tread and hardened rubber.

All of the Goodyears were basically the same temp (within 3 degrees of each other including inner and outer on the passenger side as well as on the front) while the one Bridgestone was 10 degrees cooler. I can see your point if the Goodyear mounted beside it was carrying most of the load.

For reference, ALL tires were inflated today to 100PSI before we left. Sidewall Max cold rating for the Goodyears and the Bridgestone is 110. There is less than 500 miles difference in the tread wear.

Different side wall thicknesses, belt construction, tread construction, road friction, tread thickness and other variables come into play. All of your tires were well within specification limits, so I wouldn't be concerned.

Have you considered purchasing a TPMS system so you can keep an eye on temperature and pressure while you're heading down the road?

10forty2 wrote:
All of the Goodyears were basically the same temp (within 3 degrees of each other including inner and outer on the passenger side as well as on the front) while the one Bridgestone was 10 degrees cooler. I can see your point if the Goodyear mounted beside it was carrying most of the load.

For reference, ALL tires were inflated today to 100PSI before we left. Sidewall Max cold rating for the Goodyears and the Bridgestone is 110. There is less than 500 miles difference in the tread wear.

Are all of the tires the same load rating, like F, G, or H? Since you said that the Brigestone could be inflated to 110 psi it might have a higher load rating.

All are G rated and all have max pressure listing of 110.

EDIT... Looks like the Bridgestone is slightly larger than the Goodyear with 622 Revs per mile for the Bridgestone vs 640 for the Goodyear. I really don't like mixing tread patterns on opposing wheel positions, but especially don't like different treads bolted together on duallys.

Anyway...it's temporary until we get everything settled. A new Goodyear will be put on in the Bridgestone's place and we'll likely replace the inner dually too since it was attached to the failed tire and may have some hidden damage after all is said and done.

TucsonJim wrote:
.....Have you considered purchasing a TPMS system so you can keep an eye on temperature and pressure while you're heading down the road?

I have the TST TPMS system but haven't installed it yet. Just got it for Christmas from Santa!

Temping your tires one time will not tell you much or after 60 miles, or five minutes after stopping. After several hundred miles some of the variables from your baseline are:
On a cool day or if running in the rain your temps can be 10+ degrees cooler than normal. Rarely are the front and rear tires the same temp. The bottom of the grove in the tread can be 5-10 degrees hotter than the tread. Almost always the inner dual tire will be hotter than the outside, as much as 10 degrees. On a hot afternoon the tires with the sun on them will be hotter than normal and about the only time the dual on that side will be the same temp. A strong cross wind will add 5+ degrees to one side and take that much from the other... a pretty good reason for running 5 psi over the pressure for your load.
Until you temp your tires enough times to establish a base line there are too many variables to let even a 10 degree difference bother you. I agree the smaller Bridgestone MAY explain the difference but not after 60 miles and one time.
I temp the sidewall about 1" from the tread as that is the easiest place to get to on the inside dual tire. This will be about 10 degrees cooler than the bottom of the groove in the middle of the tire... the hottest spot on my tires. I started temping my tires ten years ago, long before I have a TPMS and still do but not as often.
OP, do not let a 10+% increase in your tire pressures with your TPMS bother you as this is normal.

I had a situation last summer where I was on a long, continuous downgrade going from 5,100’ to about 1,000’. Near the end my heat alarm went off in my TPMS so I pulled over and realized that I was overheating my brakes. I wasn’t overheating them terribly, but enough to make them smoke a little and transfer some of that heat to my tires via the disc brakes and metal rims. Seemed like a good time to stop for lunch and take a long break anyhow…

I currently have five Kelly and one Goodyear due to an valve stem failure. The one Goodyear always runs hotter by a couple of degrees. Doesn't matter where it's installed. Even through Kelly is part of Goodyear I would guess that the difference in ply material, rubber formula, tread design and such will have a direct effect on rolling temperatures.