I have a question that I hope a few of you can help me out with. It is concerning tire load carrying capacity at a given pressure. Lets say for example that we have a tire that is rated for 3000lb @ 80psi. Now is it a perfectly linear scale of weight capacity as you lower the pressure? So that would mean 2250lbs @ 60psi, 1500lbs @ 40psi, etc? Just want to make sure since that is how I have always treated tire pressure on my rigs in the past. This is of great importance when you have a HD rig with E rated tires that you are driving around empty and dont need the full capacity of the tire all the time. Any help would be greatly appreciated. Thank you.
Question about tire load capacity for a given pressure
- Thread starter Saiyan66
- Start date
I also thought that if you have f.i. 80% of the maximum load, you needed 80% of the maximum pressure.
Placed this question by mail at a Dutch tire-manufacturer ( where I live) , and after 2nd mail got a copy of the formula they use for it in Europe.
Went running with this formula , and learned myself Excell to make spreadsheets for it .
https://skydrive.live.com/?cid=a526e0eee092e6dc#cid=A526E0EEE092E6DC&id=A526E0EEE092E6DC!128
This link leads to my public map of skydrive , where much about tire-pressure calculation.
To use a spreadsheet, clic on the line , but not on the name of it. Then in the right barr at download.
After eventual viruscheck, open it in Excell or compatible programm to use it.
If you press wrong, it will be tried to open in the browser, but this cant handle some things I use in most of the spreadsheets, and tels you so.
Then go back to skydrive at the top, and try again.
But now a short answer.
Part of the load is carried by the construction of the tire, so even at pressure zero, it can bare about 1 to 5% of the maximum load, depending on the tire-kind.
also on my map, article of an American J.C.Daws, with another way of calculating and comparison with the conventional formula and its diferent powers used in it in Europe and especially America. So if you have 50% of the maximum load, you may have 45% of the reference-pressure on the tire, and it gives the same deflection, what the goal is of all the calculations.
So first study this, and if new questions pup up , ask me here.
'Registered to this forum , to give you this information, found it with Google .
Placed this question by mail at a Dutch tire-manufacturer ( where I live) , and after 2nd mail got a copy of the formula they use for it in Europe.
Went running with this formula , and learned myself Excell to make spreadsheets for it .
https://skydrive.live.com/?cid=a526e0eee092e6dc#cid=A526E0EEE092E6DC&id=A526E0EEE092E6DC!128
This link leads to my public map of skydrive , where much about tire-pressure calculation.
To use a spreadsheet, clic on the line , but not on the name of it. Then in the right barr at download.
After eventual viruscheck, open it in Excell or compatible programm to use it.
If you press wrong, it will be tried to open in the browser, but this cant handle some things I use in most of the spreadsheets, and tels you so.
Then go back to skydrive at the top, and try again.
But now a short answer.
Part of the load is carried by the construction of the tire, so even at pressure zero, it can bare about 1 to 5% of the maximum load, depending on the tire-kind.
also on my map, article of an American J.C.Daws, with another way of calculating and comparison with the conventional formula and its diferent powers used in it in Europe and especially America. So if you have 50% of the maximum load, you may have 45% of the reference-pressure on the tire, and it gives the same deflection, what the goal is of all the calculations.
So first study this, and if new questions pup up , ask me here.
'Registered to this forum , to give you this information, found it with Google .
HillbillyfromAL
Explorer
I guess your looking to soften the ride with no load or a light load. Like the guy above said its got alot to do with tire construction. Mostly the thickness and construction of the sidewalls. So you have to experiment with your particular setup. For example on my 2004 F250 SD Crew cab with 33x12.50 Trxus tires 45 was perfect with no load and 65 was perfect when I had to tow the Wife's 6.0 Excursion. If you go too low you risk a large pothole at highway speeds popping the tire off the rim, and piss poor handling during hard braking. Like bad shocks or struts would give you. I'd suggest keeping as much pressure as possible while achieving the desired effect. Good luck