Unusual tire wear

might be an alignment issue. hit any particularly bad potholes lately?

It sounds more like a front end alignment problems. Have it checked, realigned at a truck shop that specializes in alignment, frame and spring issues.
If you have the same tires all around the RV, it would be time to have them rotated.

Ken

Thanks for the replies

Camber and toe are good

When the tires were new, we had to drive westward for 2 days with unrelenting 30 mph cross winds - that took a fair amount off the outer treads. Other than that trial, no suspension issues.

I just wanted to make sure that what I'm seeing is not a different rubber layer just above the cord. And wanted to know if there was a particular issue with those tires.

IMO the tires should be inspected by a reliable tire shop. If they are 22.5 tires, I'd use a shop specializing in truck tires....we can't offer you advice on the safety of those tires without a visual inspection. They may be safe, but they just as well may be dangerous. Don't compromise the safety of yourself, your family and those who share the road with you....Dennis

My experience over the years is that the F53 chassis RVs drive much better if the toe-in is set at the maximum positive value in the manual. Affected much less by wind/passing trucks. Much less steering corrections needed. The downside is I have always experienced outer edge tire wear when I have the shop make sure that is what the setting is. Have had a couple RVs in the past that when I got them required a lot of correction going down the road. When checked, one had zero toe-in, the other had been slightly negative. When the tech set them to the high end of the manual value, they drove far better. We always get around 50-55K miles out of rear tires, the fronts I'll change out at 40K due to outer edge wear. I'll swap some tire wear for more relaxed driving any day. I'm guessing your RV tracks like a railroad locomotive going down the road. This is, of course, assuming that the front end is tight and you keep everything properly greased. I'm a firm believer in chassis lubricating at every oil change. I don't think you could possibly wear out the front end on an F53 if you do that. The coach body would turn to dust first.

I agree with all that has been said it most likely is an alignment issue. However you did say something interesting about the front end being light. It is possible that if you are running to light on the front it will cause odd tire wear.

garyemunson wrote:
My experience over the years is that the F53 chassis RVs drive much better if the toe-in is set at the maximum positive value in the manual. Affected much less by wind/passing trucks. Much less steering corrections needed. The downside is I have always experienced outer edge tire wear when I have the shop make sure that is what the setting is. Have had a couple RVs in the past that when I got them required a lot of correction going down the road. When checked, one had zero toe-in, the other had been slightly negative. When the tech set them to the high end of the manual value, they drove far better. We always get around 50-55K miles out of rear tires, the fronts I'll change out at 40K due to outer edge wear. I'll swap some tire wear for more relaxed driving any day. I'm guessing your RV tracks like a railroad locomotive going down the road. This is, of course, assuming that the front end is tight and you keep everything properly greased. I'm a firm believer in chassis lubricating at every oil change. I don't think you could possibly wear out the front end on an F53 if you do that. The coach body would turn to dust first.

Thank you to all who commented and I especially appreciate the info re toe on F53 RVs - that kind of info is only available from experienced RVers.

The actual stock weight on the front tires of this 30' RV is less than the any value on the weight/tire pressure chart for these 19.5 tires. I think the chart was wrong because the tread wear indicates wear would have been more even if the pressure was always 100 psi or more,

Generally speaking, over-inflation causes the center of the tire to wear and under-inflation the outside edges. The way to get the proper inflation is to weigh the axles, preferably the individual corners. This should get you in the ballpark of the proper tire pressures.

If both the inside and outside edges of the tire are worn, under-inflation is the problem. If just one edge is wearing, it is most likely an alignment problem.

zigzagrv wrote:
Generally speaking, over-inflation causes the center of the tire to wear and under-inflation the outside edges. The way to get the proper inflation is to weigh the axles, preferably the individual corners. This should get you in the ballpark of the proper tire pressures.

If both the inside and outside edges of the tire are worn, under-inflation is the problem. If just one edge is wearing, it is most likely an alignment problem.

All accurate info. What perplexes me (and may be of use to others) is that I weighed each wheel, and then used the charts for air pressure for that size tire. In fact I actually increased the air pressure over what the charts recommended but the tires still wore much faster on the outer treads. My guess: the chart was wrong or this particular tire construction makes the outer tread wear down prematurely

You are correct that typically when a tire displays a different color rubber it is about to hit the belts. I would have them looked at. But be prepared to purchase two new tires.