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Archive for September 15th, 2007
Trailer tire wear
Posted by Bill from Harrison, NJ, US on September 15, 2007
I have been experiencing severe tire wear on my trailers for quite some time. The wear occurs mostly on the inner edges of all tires but on some instances it has happened on both the inside & outside edges., while the center of he tire remains intact. I have tried increasing as well as decreasing air pressure, computerized wheel alignments, checked bearing play, but the problem continues. Do you have any suggestions?
For this question, I defered to Mike Beckett MD Alignment. Mike has more hands on experience with tire wear issues than anyone I know. Here is his response.
"I am hearing two different problems. One, inside edge wear on duals.
I know of only two things that can cause this, loose wheel bearings and axle flex. We have at tech bulletin on our web site (http://www.mdalign.com/techbulletins/index.html) on the axle issue. We are getting this complaint from all over the country and from all brands of tires. This can be confirmed by measuring the total camber in the axle loaded and empty and noting the change.
The bearing end play is harder to find unless you check them my way or use a dial indicator on an empty hub, No wheels or drums. Most shops attempt to check them "loaded" and with 650 lbs of tires, rims and drums they cannot find the end play.
The second wear pattern, inside and outside on all tires, can be caused by the classic problems of inflation or load, but once you have proven that is is not caused by those you have to move on to speed. Over speeding a tire can cause accelerated shoulder wear. What the speed is depends on the make and model of the tire. Lower cost tires tend to be more sensitive to this factor but with enough speed any tire can succumb to it."