66 Chevrolet c10 tire pressure
- Thread starter Chevyc10
- Start date
I would start with 35 psi.
Original tires?
Made list for that tire, using 90% of the loadcapacity for 99mph for the pressure. And axleload given, so you dont need to go adding reserve and deviding by 2 yourselves. So yust search acurate determined axleloads in the list and use pressure behind it.
Succes with that, the most tricky part in it all.
This gives maximum reserve with still acceptable comfort and grip.
51psi is the maximum allowed cold pressure, the referencepressure for a Standard Load( SL) tire is 36 or 35psi
255/60R17 LI 106V
Maxload 2094lbs upto 99mph AT 36psi.
If you want it for higher speed, give that, and I will make list for that.
Axleload/cold psi for upto 99mph.
1747 lbs/ 15 psi
1845 lbs/ 16 psi
1944 lbs/ 17 psi
2041 lbs/ 18 psi
2139 lbs/ 19 psi
2237 lbs/ 20 psi
2334 lbs/ 21 psi
2431 lbs/ 22 psi/ min ETRTO
2527 lbs/ 23 psi
2624 lbs/ 24 psi
2720 lbs/ 25 psi
2816 lbs/ 26 psi/ min TRA
2912 lbs/ 27 psi
3008 lbs/ 28 psi
3104 lbs/ 29 psi
3199 lbs/ 30 psi
3295 lbs/ 31 psi
3390 lbs/ 32 psi
3485 lbs/ 33 psi
3579 lbs/ 34 psi
3674 lbs/ 35 psi
3769 lbs/ 36 psi/ referencepressure
3863 lbs/ 37 psi
3957 lbs/ 38 psi
4052 lbs/ 39 psi
4146 lbs/ 40 psi/ maxload of 2
4240 lbs/ 41 psi/ tires 4188lbs
4333 lbs/ 42 psi
4427 lbs/ 43 psi
4521 lbs/ 44 psi
4614 lbs/ 45 psi
4708 lbs/ 46 psi
4801 lbs/ 47 psi
4894 lbs/ 48 psi
4987 lbs/ 49 psi
5080 lbs/ 50 psi
5173 lbs/ 51 psi/max cold pressure
Succes with that, the most tricky part in it all.
This gives maximum reserve with still acceptable comfort and grip.
51psi is the maximum allowed cold pressure, the referencepressure for a Standard Load( SL) tire is 36 or 35psi
255/60R17 LI 106V
Maxload 2094lbs upto 99mph AT 36psi.
If you want it for higher speed, give that, and I will make list for that.
Axleload/cold psi for upto 99mph.
1747 lbs/ 15 psi
1845 lbs/ 16 psi
1944 lbs/ 17 psi
2041 lbs/ 18 psi
2139 lbs/ 19 psi
2237 lbs/ 20 psi
2334 lbs/ 21 psi
2431 lbs/ 22 psi/ min ETRTO
2527 lbs/ 23 psi
2624 lbs/ 24 psi
2720 lbs/ 25 psi
2816 lbs/ 26 psi/ min TRA
2912 lbs/ 27 psi
3008 lbs/ 28 psi
3104 lbs/ 29 psi
3199 lbs/ 30 psi
3295 lbs/ 31 psi
3390 lbs/ 32 psi
3485 lbs/ 33 psi
3579 lbs/ 34 psi
3674 lbs/ 35 psi
3769 lbs/ 36 psi/ referencepressure
3863 lbs/ 37 psi
3957 lbs/ 38 psi
4052 lbs/ 39 psi
4146 lbs/ 40 psi/ maxload of 2
4240 lbs/ 41 psi/ tires 4188lbs
4333 lbs/ 42 psi
4427 lbs/ 43 psi
4521 lbs/ 44 psi
4614 lbs/ 45 psi
4708 lbs/ 46 psi
4801 lbs/ 47 psi
4894 lbs/ 48 psi
4987 lbs/ 49 psi
5080 lbs/ 50 psi
5173 lbs/ 51 psi/max cold pressure
Last edited:
Originals were likely bias ply so any original information is irrelevent.
If he puts that much air in them and runs over a coin, he will be able to tell if it's heads or tails.
According to Tire Guides, a 1971 C10 4X2 with 7.00-15 had an inflation pressure of 32/32 psi. The book doesn't go back to 1966.
So are you sure about the original tire size and inflation pressures?
Let's do it both ways:
7.00-15 at 32 psi = 1240#
7.75-15 at 24 psi = 1270#
In order to carry the same load, a 255/60R17 needs .... well, it doesn't go that low. The lowest value is 1775# at 26 psi.
I am of the opinion that if the load table only goes down to 26 psi, that is the lowest pressure anyone ought to use.
There is a school of thought that says to match the inflation pressure so that you get about the same spring rate.
So there are the facts as I know them.
So are you sure about the original tire size and inflation pressures?
Let's do it both ways:
7.00-15 at 32 psi = 1240#
7.75-15 at 24 psi = 1270#
In order to carry the same load, a 255/60R17 needs .... well, it doesn't go that low. The lowest value is 1775# at 26 psi.
I am of the opinion that if the load table only goes down to 26 psi, that is the lowest pressure anyone ought to use.
There is a school of thought that says to match the inflation pressure so that you get about the same spring rate.
So there are the facts as I know them.
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