5th wheel Truck combo = terrible ride

rhagfo wrote:

Cummins12V98 wrote:

benb21601 wrote:
I towed for years on a similar setup-- 2500 duramax with a 12k 5er. Never had the issues you're speaking of. Keep 65 in the front, 80 in the back. DO NOT under inflate your rear axle tires! This reduces capacity and can heat the tires faster and to a higher temp, both increasing probability of a tire failure. I would look at your "spring enhancement". That's probably the source of the roughness. I suggest airbags which provide a little more cushion while being tailored to your load and possibly the aforementioned trail air pinbox. Both help immensely. Hope this helps.

Please explain why not reduce the rear tire pressure?

His weight is 2,650 per tire he could run 65psi. But to add a safety factor 70 psi would give 2,815 capacity. On his fronts 65 is a good number 60 would be fine but adding 5psi gets you plenty of capacity.

X2

Don't understand the run them like rocks group!! Running tires overinflated for the load carried increases the chance for damage from potholes.
I had a neighbor who ran a couple log trucks ran his 110# tires at 90# all the time. Tires lasted longer with far less cuts from large crushed rock used in logging roads. Don't ever recall him throwing a cap in the eight years I lived next to him.

A friend has a 09 RAM dually I asked what pressures he ran in the rear tires he said 80. The centers were almost gone and the edges were still good with only 20some thousand on them. I suggested he weigh his rig loaded and use the inflation chart. Did not sink in!