I agree with Steve regarding the maintenance to prevent wear. Our Explorer can exhibit the issue, more to tire problems than steering component wear, though. After towed trips, I've found it prudent to have a shop check its alignment.
Towing seems to affect certain cars front end, and if not aligned regularly it can result in abnormal tire wear. Make sure your tow bar is relatively level... a straight shot from coach hitch to car bumper/frame. If the car is high or low relative to the coach it can affect whether the coach is pulling slightly up, unweighting the toad's front end or pulling down, loading it. Roadmaster in Vancouver agreed and used an adapter to lift the hitch point at the coach; our Monterey has a relatively low backside, so the tow bar was angled slightly higher at the car, tending to pull down on the car's front end on the highway.
Raising the receiver some inches compensated, leveling the tow bar, and minimizing my regular purchases of front tires. But I still have the Explorer's alignment checked at least once a year, twice if towed much, and especially following a long RV trip. The trick can be to find a reputable shop that uses the correct alignment numbers.
Joel
