Hey guys looking for some help, 2009 BT50 RWD recently upgraded rims & tyres from 15” to 17” lower profile. After about 4 weeks steering started vibrating between 70-80k’s.
Supplier checked & rebalanced wheels, no improvement. Any idea on cause

 

Did you try putting the rear tires onto the front?

Last year on my 1988 B2200 I had similar steering wobble at high speed. I had lifetime warranty and closeout front end parts so installed new ball joints, tie rod ends, tensioner bushings, and sway bar bushings, but stayed the same. Since I needed new rear tires, I went to tire store who said the fronts needed re-balancing but weren't sure if that was enough to cause my issue. So I had the 2 brand-new tires put on the front, that fixed mine

 

New tires? Or did you buy used tires and wheels? Also, it could be worn suspension parts......particularly, inner & outer tie rod ends and/or idler arm or pitman arm ball joints.

 

New tyres on secondhand rims, have had mechanic check all suspension, says all ok.