Vibration/Shake at certain speeds
I put new tires (Bridgestone Duravis R250's) on our 31' 2005 Jayco Granite Ridge back in July.
I believe ever since then I have noticed a vibration/shake at speeds between 38 and 50 mph.
I took it back to the chassis shop who installed the tires and they rebalanced them (found to be about an ounce off on each one). This helped a little but the vibration is still there. The shop told me normally with a balancing issue the vibration doesn't stop at a certain mph but continues on up with the speed increase.
I had it aligned when the tires were installed. The shocks are originals. Hellwig helper springs factory installed. 16,000 miles on rig. Air pressure in all tires is correct.
The shop said the drive train is as straight as an arrow.
The shop is questioning the accuracy of his balancing machine but calibrated it before rebalancing the wheels.
Any ideas what could be causing this?
I know these are stiffer (steel side wall) tires.
Could it be a shock issue?
I believe ever since then I have noticed a vibration/shake at speeds between 38 and 50 mph.
I took it back to the chassis shop who installed the tires and they rebalanced them (found to be about an ounce off on each one). This helped a little but the vibration is still there. The shop told me normally with a balancing issue the vibration doesn't stop at a certain mph but continues on up with the speed increase.
I had it aligned when the tires were installed. The shocks are originals. Hellwig helper springs factory installed. 16,000 miles on rig. Air pressure in all tires is correct.
The shop said the drive train is as straight as an arrow.
The shop is questioning the accuracy of his balancing machine but calibrated it before rebalancing the wheels.
Any ideas what could be causing this?
I know these are stiffer (steel side wall) tires.
Could it be a shock issue?
