Hey all,

One more question about my problem.

Is it ok to pump a tire up to 65psi to seat it on the rim??? he did this and said it will be perfectly fine, although on the tire itself it says not to go above 40psi to seat the beads...Could this damage the tire? The tire already isn't round so who knows what is wrong with it, and and wondering if he caused more damage by doing the 65psi thing.

Thanks

 

The 40 psi on the sidewall is for constant inflation not for seating the bead.
At 40 psi you would not seat a tire bead.

As long as it is for short period like the 10 seconds needed to seat a tire bead the tire can take a lot more than the posted 40 psi.

BTW cold 40psi is close to 50 when hot after running a few hours. That's why you should adjust tire pressure only on cold tire.

 

It actually says on the tire not to inflate over 40psi to seat beads - it specifically says that . The max psi for the tire for operation is 35psi (Toyo open country HT).

Doing a search on the net, every tire company says not to exceed 40psi when seating beads....hence my question.

 

I worked for an aircraft engine maker (33 years) where every engineering manual had to be approved by the legal department, especially for the litigation happy US market.

I would like to see them bead a tire at 40 psi without using a mallet, which is probably worst than 65 psi.

 

I'm just the messenger lol....I was just nervous when he took the tire that obviously has a defect in it and pumped it up 25 PSI over the max it says on the tire when seating the bead.

Either way, hell, if it isn't a safety issue, I'll just keep the tire on. However, it is just very unsettling to see a wobble in a tire going down the highway, and then knowing it was inflated 25 psi beyond what it says to.

Just do a quick google search on psi to seat the bead on a car tire- you'll see why I asked the question

 

After reading a few of the pdf and government of California warning I think they are more worried about the lip of the wheel breaking off and hurting someone or being left cracked. I think older cast Aluminium might be at risk from the hard impact of a high psi beading.

If everyone quote the same number regardless of the tire construction or aspect ratio I suspect the wheel is the source of the worry as this is the uncontrolled part of the assembly.

If it was that sensitive every tire mounted in that shop would have failed prompting action from the tire suppliers.

In any case, distorted tires nearly always have a belt problem (not strait in the carcass) or side wall de-lamination from manufacturing or pot hole impact