Buzz

Both rear tires on my fiver are wearing unevenly. They seem to be wearing on the inside quicker than the outside. I always check my pressures, lug nuts, etc.. Any ideas?

Barry Smith

Axle alignment. If your axle isn't squared it will wear the tires.

SuperGewl

You may want to check the load on the axels also. You may have too much weight on the rear or the height of the hitch may be too high causeing most of weight to be shifted to the rear axel

Buzz

I checked my axels for square. They are within 1/8" of each other. My RV dealer says having the rig high in the front won't effect tire wear one way or the other.

Casey Balvert

Your RV dealer is wrong. Having the trailer high in the front cause increased loading of the rear axle. As the load increases the weight on the wheels causes the axle to flex and increases the camber of the tires cause wear on the inside. Check the weights on each axle and adjust the trailer accordingly and then have the alignment checked. FWIW.

Casey

Buzz

One would think the springs would compensate for minor inequities in loading?? I'm not disputing your theory...just looking for answers. I checked the axel tube for straightness with a string and it appears to have a slight upwards bend in the middle, which theoretically, should cause the outside of the tires to wear? Yes?Thanks for the input.

Casey Balvert

That bend is there to offset the tendancy of the axle to flex under load. But since your tires are wearing on the inside, then that bend needs to be adjusted by an alignment shop. One sure way of determining the axle loading it to weigh the rig. Weigh both axles of the trailer then pull up so that the front axle is just off. The last weight is the rear axle load and then just subtract that from the total axle load to calculate the front axle's loading. While the springs and equalizers help to distribute the load evenly over uneven road surfaces, they can only do so properly if the trailer is relatively level. Again, weight the axles to be sure.

Just how much higher is your front end over level? The trailer frame should be within about an inch front to back.

Casey

Buzz

I haven't measured but I'd guess I'm about 3 or 4 inches higher in the front. My 5er was built with the springs on top of the axel so "flipping" is not an option. Does someone make a lift kit for this type of problem? Perhaps blocks and longer U-bolts??? I have to take it in for warranty work in a couple weeks and thought I'd see what they can do about the leveling issue. Thanks again.