Spare Tire Inflation
- Thread starter Lakersguy
- Start date
- Status
i always put spares at max inflation. cant count how many i would check and they would be at 0psi.
JHZR2
Staff member
I guess the question is what is the addition with repect to air pressure when loaded and mounted, vs. unloaded.
I believe that if one does a force balance, all pressure or variations should effect the shape and allow a consistent pressure to be maintained, even if pressurized without a load on the wheel/tire.
Capriracer likely has the fast answer...
I believe that if one does a force balance, all pressure or variations should effect the shape and allow a consistent pressure to be maintained, even if pressurized without a load on the wheel/tire.
Capriracer likely has the fast answer...
Originally Posted By: bdcardinal
i always put spares at max inflation. cant count how many i would check and they would be at 0psi.
+1
50 psi probably won't hurt anything but if you have an old old spare with a 35psi max then it might not like being 15 psi over for a few months...
Just keep it at the max on the sidewall and check it when you change the oil. Or carry a hand pump like me.
Ian
i always put spares at max inflation. cant count how many i would check and they would be at 0psi.
+1
50 psi probably won't hurt anything but if you have an old old spare with a 35psi max then it might not like being 15 psi over for a few months...
Just keep it at the max on the sidewall and check it when you change the oil. Or carry a hand pump like me.
Ian
Originally Posted By: JHZR2
I guess the question is what is the addition with repect to air pressure when loaded and mounted, vs. unloaded.
The PSI in a tire will be the same, regardless if it's on your vehicle or in your trunk.
I guess the question is what is the addition with repect to air pressure when loaded and mounted, vs. unloaded.
The PSI in a tire will be the same, regardless if it's on your vehicle or in your trunk.
Originally Posted By: bdcardinal
i always put spares at max inflation. cant count how many i would check and they would be at 0psi.
I agreed. Whenever I check the spare, probably once every 2-3 years, the spare's pressure dropped 15-20 PSI. When I remember to inflate the spare while filling up at gas station, I always had the spare at max pressure on sidewall. The reason I do this is when I need the spare let say a year later, the pressure probably drop some and with pressure gauge in glove-box, I can quickly adjust it down to the level I need.
i always put spares at max inflation. cant count how many i would check and they would be at 0psi.
I agreed. Whenever I check the spare, probably once every 2-3 years, the spare's pressure dropped 15-20 PSI. When I remember to inflate the spare while filling up at gas station, I always had the spare at max pressure on sidewall. The reason I do this is when I need the spare let say a year later, the pressure probably drop some and with pressure gauge in glove-box, I can quickly adjust it down to the level I need.
I think most donut spares call for 60 PSI.
I wouldn't inflate any spare beyond the maximum pressure printed on the sidewall. For most passenger tires, that's 44 PSI. For many light truck (LT) tire sizes, that's 50 PSI and beyond.
I wouldn't inflate any spare beyond the maximum pressure printed on the sidewall. For most passenger tires, that's 44 PSI. For many light truck (LT) tire sizes, that's 50 PSI and beyond.
- Status
