Trulyvintage Posted June 5, 2013 Share Posted June 5, 2013 (edited) Front steer tire cupping on one ton dually trucksI had new steer tires installed on my F350 Duallyabout 4000 miles agoAmerican made Cooper Discoverer HT tires ...I noticed cupping and had them replaced yesterdayAn older guy recommended I lower the tire pressurefrom 80 p.s.i. maximum to 65 p.s.i.As I know, when you tow a trailer on some of theGreat American Roadways ....The bouncing caused by the uneven road surfacestends to make the front end lift higher than the rear at times ....Lowering the air pressure should keepmore front tire contact with the road and reduce or eliminate the cupping ....Front shocks are o.k. .......Jim Edited January 22, 2016 by Trulyvintage (see edit history) Link to comment Share on other sites More sharing options...
51dyno Posted June 5, 2013 Share Posted June 5, 2013 Are you using a equalizer hitch ????? Link to comment Share on other sites More sharing options...
Trulyvintage Posted June 6, 2013 Author Share Posted June 6, 2013 Of Course .... Link to comment Share on other sites More sharing options...
Alfre Posted June 7, 2013 Share Posted June 7, 2013 incorrect balance will cause cupping Link to comment Share on other sites More sharing options...
Guest Pops1532 Posted April 21, 2014 Share Posted April 21, 2014 I agree. Out of balance. I had the same problem on an F250. Link to comment Share on other sites More sharing options...
Restorer32 Posted April 22, 2014 Share Posted April 22, 2014 Tire cupping seems to be like potholes. Once they start they just keep getting worse. Balance or wheel alignment. Link to comment Share on other sites More sharing options...
Larry Schramm Posted April 22, 2014 Share Posted April 22, 2014 Just in my opinion, the first thing that I would confirm is that the front end alignment. Not unusual to have a worn out part along with the alignment off. I would then keep the tire pressure at the maximum suggested pressure. Just my humble opinion and what I do. Link to comment Share on other sites More sharing options...
Layden B Posted April 22, 2014 Share Posted April 22, 2014 You say " front shocks are OK" but maybe OK isn't good enough! Shocks are the greatest cause of tire cupping. Link to comment Share on other sites More sharing options...
avgwarhawk Posted April 24, 2014 Share Posted April 24, 2014 (edited) Just in my opinion, the first thing that I would confirm is that the front end alignment. Not unusual to have a worn out part along with the alignment off. I would then keep the tire pressure at the maximum suggested pressure. Just my humble opinion and what I do.Bingo. The camber is out of spec. To much negative camber. Have the alignment checked. Sadly, once the tire starts to cup it will continue to cup and not smooth out. Edited April 24, 2014 by avgwarhawk (see edit history) Link to comment Share on other sites More sharing options...
Alfre Posted April 25, 2014 Share Posted April 25, 2014 If the cupping is't to bad the tire can be shaved by some tire shops and still be useable Al Link to comment Share on other sites More sharing options...
countrytravler Posted November 2, 2015 Share Posted November 2, 2015 We used the balance jell. Works great. Link to comment Share on other sites More sharing options...
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