ok now i get it, sorry for the confusion, and it makes sense to be a separate thread...
Originally Posted by Mike Lewis
sorry Robert---i was speaking of tow vehicle tires , rear in particular---pieman
i still don't know the answer however.
i think you are right that the haha alters the forces on the tv REAR (driveline tires)
i don't know it that increases or decreases friction or sidewall forces (tv tires) compared to other hitches.
i've towed approx 50k with the haha.
oem bfgoodrich rugged trail t/a e rated tires, usually kept at 70-78 psi...
and rotated every 5k,
BFGoodrich Rugged Trail T/A
i expected NOT to like this tire, but they performed really well in all conditions and loads...
and were used for the first 45,000 miles of towing.
with ~6/32nds left (i could have gone another 10k) i went for new rubber.
bridgestone dueler at revos, here's a picture of them...
i've towed approx 5,000 miles with this tire (just rotated) and the rear (drive)tire wear was...
4-5/32nds MORE than on the front (steering) tires...
really a significant difference in just 5 k.
well i was tinkering with w/d and opted to adjust the haha spring bars so that less tension was on the bars and more weight on the rear axle.
it was fine towing this way BUT the extra rear load (approx 800lbs) really ate the tires.
so back to your question, perhaps your reduced wear is a result of better load distribution
clearly the haha allows for smaller increments of adjustment...
i'll post tv tire pics soon.
u realize this could be a VERY dangerous thread...
since it covers TWO of the hottest, most flame shootin' topics on the forums...