Community Forums

PatStab · 01-14-2014, 08:44 AM

I'm heading out tomorrow to get my new rear tires, got 2 new Michelin 275/70 R22.5 XRA2's for the front a month or so ago, now getting the
same for the rear with the long valve stems so I can gauge the inside ones.

I'm going to have them put 100 psi all around, I did 95 or so in the front and not sure its enough, not steering as well as the 2 old mismatched ones.

I'm heading out Thursday or Friday and going to stop at a truck stop and get weighed so I can have the pressures adjusted according to Michelin's psi and weight chart.

Sounds silly to get excited over tires, but we don't know the age of the
inside dualies and the outer ones are 10 years old with a bit of surface cracking. To old in my book to trust on a several miles trip. And for what they cost, I need to get excited, most expensive thing I've bought lately.

Tireman9 · 01-15-2014, 10:07 AM

Quote:

Originally Posted by PatStab

I'm heading out tomorrow to get my new rear tires, got 2 new Michelin 275/70 R22.5 XRA2's for the front a month or so ago, now getting the
same for the rear with the long valve stems so I can gauge the inside ones.

I'm going to have them put 100 psi all around, I did 95 or so in the front and not sure its enough, not steering as well as the 2 old mismatched ones.

I'm heading out Thursday or Friday and going to stop at a truck stop and get weighed so I can have the pressures adjusted according to Michelin's psi and weight chart.

Sounds silly to get excited over tires, but we don't know the age of the
inside dualies and the outer ones are 10 years old with a bit of surface cracking. To old in my book to trust on a several miles trip. And for what they cost, I need to get excited, most expensive thing I've bought lately.

Glad you are replacing the old tires. Even if you can't get the individual tire loads (ie corner weights) of your loaded RV you can still do a quick run across a CAT scale and confirm your axle loads. With that number you consult the Load/Inflation tables to establish the MINIMUM cold inflation. It is suggested you add 5 to 10% as a safety margin and use that number when checking cold inflation.
Do you have a TPMS? It might just save the cost of a tire if you get a puncture or slow valve leak.

PatStab · 01-15-2014, 10:28 PM

No my motorhome is old and I haven't had them on any motorhome I've had.

I understand they are nice to have and may later down the road. One reason I got the XRA is they are supposed to have a more substantial sidewall to help them not get punctured or cut so easily. The motorhome did have them on the ones we could see and one Goodyear. I asked the tire store guy how old the inside ones were, just out of curiosity but he didn't really want to answer me so I didn't find out. They didn't have the long stems in, showed me the ones the fire department uses, well those don't help me, I can't get to them. He got some long ones but said if they are any longer they tend to leak. I had braided ones and they are worthless but then we got the long steel ones for the last motorhome and they did well. They went to a big truck place and got them so hoping they are good. I hate fighting to try to get a pressure on those inside dualies now I don't have to IF they don't leak.

Yes I will hit a cat scales and at least get the front axle and the back one weighed separately. I'm not sure I can load water, think it might be to cold, not that it will freeze I have heated bays but that I can't stand the cold to put it in, brrrr. Supposed to be 24 Friday, the oil will be thick that morning. It didn't want to stay running yesterday morning and I found my batteries were way down on their charge, hooked up my battery minder overnight and she kicked right off and kept running this morning and I started out slowly.