Tire pressure
Tires inflated to the maximum pressure stated on side wall , how much will that pressure increase from the heat of the road ? for you folks that have tire monitors , Thanks
Forum Discussion
Dave H M wrote:
Just got my TST system cranked up and also just came off the road from a 920 mile run. Have 16's on the fifth wheel so I always start at 80 psi cold. It was generally around 56 degrees or cooler outside. One morning it was 40 outside and I noticed the tires generally had dropped from 80 to 78. The highest pressure indicated was 92 psi. Temp ran about 12 degrees higher than ambient.
I been wondering on this subject also so this was a good read.
I did not time it but sure was surprised how the tire temp and pressure quickly climbed close to the final running numbers when initially starting out.
The rule of thumb is that you'd like no more than a 10% pressure build up - and if you get 15% or more, you need to take action.
You are AT 15%, so you need to take some action to improve the load carrying capacity of the tires - which means a larger size or more inflation pressure.
You said you were using 16" tires at 80 psi, but you didn't say what size. If they are ST235/80R16 Load Range E's, I'd recommend you move up to the larger LT235/85R16's Load Range E's.
