Uniscaper, Post here again after you determine whose axles those are. If they are in fact Dexters, I'll give you a name and phone number at Dexter. There should be a metal tag on the back side of each axle tube somewhere near the center of the axle, riveted in place, with serial numbers that will identify it as a Dexter. It sounds like either the spindles or the axle tube itself is bent, neither of which should have happened unless you've grossly overloaded the trailer or backed into something with that rear axle. The only other possibility is that the rear axle is improperly aligned with the front axle, causing the tires to 'scrub' instead of rolling in line with the front ones. You can check this by measuring the distance between the front and rear axle centers. When you have the wheels and drums off the spindles to do that brake job, measure the distance between the dimples, (or grease fittings, if so equipped), that you will find in the center of each spindle end of the two axles. The measurements from one side compared to the other should be within 1/8". NO MORE! And yes, you are correct. You would need to change the whole axle to gain more capacity. The biggest gripe I have with spring suspensions is all the moving parts that continually wear out; the spring shackles, equalizers, bushings and the bolts that hold them all in place. Once these start to wear, the axles tend to go out of alignment and cause tire wear like you're experiencing now. Let me know how you make out! chaikwa.