Originally Posted by Ron & Kerrie
I have a 1999 Newmar Dutch Star DP. Had the front tires changes recently (about 3 weeks ago). The other day I noticed. The tires that were on it were 275/70r/22.5 XZA 1 the new tires are 275/70r/22.5 XZE 2+. Can someone tell me the difference and should I be concerned?? I paid a lot of money for the tires. I told them when I took it in there I wanted the same tire out on it.
Here are a couple of references for you:
One of these is specific to RV tires and the other is commercial tires and our tires are in that category.
Michelin nomenclature is as follows:
1. X is Michelin
2. Z is all position
3. A is highway service and E is regional service
The various other modifiers Michelin uses is generally for up dates or variations on a particular tire design.
We should remember when we replace tires that our tires are all basically engineered for truck service. Even the two tires marketed as RV tires are just variations of tires built for trucks. If we want something specific we need to be sure to be very specific when we buy. If we just ask for a size, we may just get what ever the seller has in inventory. In the case on the OP it worked out fine, but don't count on it. Sometimes the same tire size will come in more than one load rating. If you need a LR H and the tires tire puts on a LR G you may be over weight when you drive away.
The other thing to look at on the tire is the manufacturer date code to make sure you didn't get tires that are already a year old.