How does over inflation affect wandering?

DAS26miles wrote:
We are taking the Mh out tomorrow for a 2 day trip to the beach 70 miles away. We will see if the lower psi makes handling better. 62 front and 70 psi rear. Otherwise, it's back to the shop.

try 65 frt 75 rear,if to low you roll side to side on sidewall need stiff sidewall

We are taking the Mh out tomorrow for a 2 day trip to the beach 70 miles away. We will see if the lower psi makes handling better. 62 front and 70 psi rear. Otherwise, it's back to the shop.

DAS26miles wrote:
My MH weighed in at 4420 front axle, 8540 rear axle and 12960 GVW. I lowered the air to 63 psi front and 70 rear. No food in the MH when weighed, that was the only thing missing. So allowi for 100-150 lbs more on rear axle. Should I drop the rears to 65 or 68?

IMO you are close enough to your max loaded weights that you should have no issues caused by overinflation. You should be running 65 front,80 rear as Ford specifies. The stock size tires give very little margin for overloading, and the typically small motorhome fender well offers poor air circulation for tire cooling. Running underinflated invites tire failure. If you are having handling issues I suspect something other than tire inflation.

DAS26miles wrote:
BruceMc wrote

BTW- check see if your new nav radio has the Q22015 update. Some have Q4 2012. You can update them within 30 days of activation. If you have a problem send me a PM

Will do!
We've brought the new unit home, but other than showing it off to family, we've yet to do anything on it.
However, with the pressures set by the factory, it drove very well on the way home. I've no idea what they are set to, but will note the pressures to use as a baseline.
Of course, the Chevy drives much better than the Ford anyway.

I think on most older C w/ 14.050 total it should be 65 max frt 80 R, now w newer 1's the total is 14500 now the catch they say frt now 450 more just 50 more on rear. it hard to carry more on frt as where do you put it. forgot mine 65 frt 80 R w/airbags total weight pushing 14 k, handels like a dream no wander 1 hand steering,very very little passing semi sway

80 in our front tires, when I had requested 60, made the coach nearly uncontrollable on the down grade side of a high bridge in a cross wind.

Over inflation reduces the "tire" patch that touches the road.
You have reduced traction for steering and breaking.
On wet roads it is even worse.

You wear out the center of the tire, as that is what is carrying the load.

My MH weighed in at 4420 front axle, 8540 rear axle and 12960 GVW. I lowered the air to 63 psi front and 70 rear. No food in the MH when weighed, that was the only thing missing. So allowi for 100-150 lbs more on rear axle. Should I drop the rears to 65 or 68?

I had some steer wander and was going to have the front aligned to make sure it was right, also was considering adding heavier sway bars. First I added 55-60 psi to the rear airbags, did help, then I went to 65 in front tires and 70 in rears made a world of difference. Try various settings before doing anything Mine is a 12 winnebago aspect scales at around 12500.

Over inflation REDUCES the effective CASTER TRAIL which INCREASES the tendency to wander.

The caster trail can be increased by adding + caster during the alignment which will reduce the tendency to wander.