tire pressure
I have an Itasca Sunova 35j, and posted on the driver's side of the coach it says 80 psi cold all tires. I have 6 19.5 Michelins and on the sidewall it's stamped 120 psi cold. I've always split the di...
Forum Discussion
chompchomp wrote:
I have an Itasca Sunova 35j, and posted on the driver's side of the coach it says 80 psi cold all tires. I have 6 19.5 Michelins and on the sidewall it's stamped 120 psi cold. I've always split the difference on the road. If we're at 100 psi all around, we're rolling.
I'm just curious how the rest of you navigate that; I mean 40 psi is a big discrepancy. Thanks for any feedback.
Are the tire sizes the same? I almost sounds like the original tires - the ones listed on the vehicle tire placard - were 235/85R16 Load Range E (80 psi max). If that is the case, then those 19.5's are probably an upgrade.
Oh and a Rule of Thumb: You don't want to get more than a 10% increase in pressure between cold and running. If you get more, then you need to slow down and think about getting tires with more load carrying capacity. (Maybe that's what happened here?)
If you get 15% or more, you need to take immediate action. Slow down AND get tires with more load capacity - within a week!
