The right PSI for semi-truck tires is a subject often debated within the trucking community. However, how much PSI in semi truck tires largely depends on the truck, the tires, and the maximum load.
It’s important to note that there are a number of factors that have an impact on what PSI you should be using.
More often than not, you can look up the tire manufacturer’s recommendation as a baseline. Then make allowances for the conditions you’ll be driving in, load weight, and some other factors.
What we do know for sure, is that if you do not have the right PSI in your truck tires you will reduce the life of your tires and increase fuel consumption.
If the PSI is overinflated, you risk a tire blowout and can lose control over your truck. If you are unsure of your tire’s max air pressure – you can find it stamped on the tire’s sidewall.
Additionally, another reason to avoid blowing a tire is that, if they were found to be overinflated, you risk voiding your warranty.