Tires: Motorhome tires, motorhome tires, rear tires

Question
I recently had two front tires go flat/blow outs while traveling. Both times i had a vibration on the steering just before the blow out. I am sure the reason for the flats/blow outs were that something was picked up by the tires off the roadway. The motor home tires are LT235/85R 16/E tires at 80 lbs. I would like to replace the front tires to LT235/85R 16/G at 110 lbs. For economic reasons I do not plan on replacing the rear tires at this time. If I had to replace a rear tire I would use a LT235/85R 16/G at 80 lbs until all the tires were replaced then change the tire pressures on the rear to 110 lbs. My questions are in regard to the riding comfort level of the front LT235/85R 16/G at 110 lbs. and the mixing of the rear tires load ratings with the 80 lbs pressure.

Answer
Jerry,

First, it is not a good idea to mix tires within a vehicle - especially on the same axle, and ESPECIALLY within duals!!!

Since you are fairly certain that your problems come from an external source - and not a problem with the tire - I find it curious that you want to move to a much higher Load Range.  Going this direction - higher pressure - is going to make the tire more prone to damage from external sources.

But another consideration is the rim - will it be able to withstand 110 psi?

My recommendation is - assuming you truly want to go with a Load Range G - is to get 2 front tires in a LR G, and use 90 psi - saving the spare for use on the duallies.

If you are faced with a situation where you have 2 LR E's left - and hopefully that won't happen - then you can use those on the front for the short period.

As a way to make sure that the pressure is adequate, check the pressure buildup.   

1)  Set all the pressures before you start a trip.  Make sure they are "cold" - in the sense that it has been at least 1 1/2 hours since the vehicle has been moved.

2)  Drive for an hour on the interstate and check the pressures again.

If the difference is 2 to 4 psi - that's good.

If the difference is more than 4 psi - you need to add more pressure  - add whatever the build up is.  Of course you don't want to exceed the maximum on the sidewall - and there are a few exceptions which we can cover if it turns out that you have this happen.