Ran my tire pressure up to 50 psi
#1
AudiWorld Member
Thread Starter
Ran my tire pressure up to 50 psi
My 2017 with 15,000 miles had the tire pressure set at 30 psi from the dealer/factory.
The side of the tire said max pressure is 50 psi. I like running at the max pressure - so i took it up to that level.
Surprisingly, my mileage increased (1 mpg) and the ride stayed the same.
The side of the tire said max pressure is 50 psi. I like running at the max pressure - so i took it up to that level.
Surprisingly, my mileage increased (1 mpg) and the ride stayed the same.
#3
AudiWorld Super User
Originally Posted by Tire Rack
Disadvantages of Over inflation:
An overinflated tire is stiff and unyielding and the size of its footprint in contact with the road is reduced. If a vehicle's tires are overinflated by 6 psi, they could be damaged more easily when running over potholes or debris in the road. Higher inflated tires cannot isolate road irregularities well, causing them to ride harsher. However, higher inflation pressures usually provide an improvement in steering response and cornering stability up to a point. This is why participants who use street tires in autocrosses, track events and road races run higher than normal inflation pressures. The pressure must be checked with a quality air gauge as the inflation pressure cannot be accurately estimated through visual inspection.
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#4
AudiWorld Member
Thread Starter
I call over inflating going above the recommended max pressure - which I'm not.
Increase tire wear on the center.......okay - but maybe at lower I wearing the tires on the outside. Is there a difference?
Increase tire wear on the center.......okay - but maybe at lower I wearing the tires on the outside. Is there a difference?
#5
AudiWorld Senior Member
Max pressure on the tire is for when th tire is carrying maximum load and unless you have your Q loaded with people and luggage and towing a heavy trailer you are not carrying maximum load. You will get very poor tread wear and they will not perform properly in an emergency situation with that much pressure.
#6
I too like the feel of higher tire pressures. I always run close to maximum load pressures on all our vehicles. On our 2011 Q7 the door sticker max load pressures are 44 front 49 rear. I have run three sets of tires now at 44 psi front and rear. ( 49 rear when towing my track car or boat). 50 psi sounds a little high but 40-- 45 should be fine. We have gotten about 35000 miles from Continental DWS at these pressures with very even wear across the tread.
Our newly purchased Pirelli Scorpion Verde plus have a 740 tread wear rating. I expect to get 50000 mile from them ( if we have the Q7 that long. It is a TDI)
Our newly purchased Pirelli Scorpion Verde plus have a 740 tread wear rating. I expect to get 50000 mile from them ( if we have the Q7 that long. It is a TDI)
#7
AudiWorld Super User
OP, you are completely misunderstanding the max inflation pressure indicated on the tire wall. That's not recommended pressure by anyone. Neither the tire manufacturer nor Audi. That's the maximum cold tire pressure that the tire is designed to hold w/o risking to blow up. Keep in mind that tire pressure goes up by 1 psi for every 10 degrees, so if you fill up your tire to 50 psi on a cold winter day, you'll be over what the tire is designed for as soon as outside temperatures raise.
Not only will you have severely compromised tire wear, because the tire is now ballooned at the center and doesn't make full contact with the road anymore, but because of the reduced contact patch, you'll have compromised handling and braking. Yes, your mpg went up, because you lifted part of your tire off the pavement, so you reduced the tire's rolling resistance, but that puts you and your tire at risk.
The recommended max tire pressure for a specific vehicle's weight is indicated on the door sticker. You'll notice that's significantly below the tires max inflation pressure. Not only leaves that plenty of head room before the tire is operated at its inflation limit, but it also is the proper tire pressure for the weight of the vehicle, so that the tire makes full contact with the road. If you check your owner's manual there is something called recommended normal load pressure. That's the pressure you should use if you are just driving around by yourself with the car mostly empty, because of the lighter weight of the vehicle.
Not only will you have severely compromised tire wear, because the tire is now ballooned at the center and doesn't make full contact with the road anymore, but because of the reduced contact patch, you'll have compromised handling and braking. Yes, your mpg went up, because you lifted part of your tire off the pavement, so you reduced the tire's rolling resistance, but that puts you and your tire at risk.
The recommended max tire pressure for a specific vehicle's weight is indicated on the door sticker. You'll notice that's significantly below the tires max inflation pressure. Not only leaves that plenty of head room before the tire is operated at its inflation limit, but it also is the proper tire pressure for the weight of the vehicle, so that the tire makes full contact with the road. If you check your owner's manual there is something called recommended normal load pressure. That's the pressure you should use if you are just driving around by yourself with the car mostly empty, because of the lighter weight of the vehicle.
Last edited by superswiss; 01-22-2017 at 04:36 PM.
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#8
AudiWorld Member
When I took delivery of my Q, my tires were set to 49psi. Not sure why? I then reset the front to 34 and back to 37 when cold. I like to set them 2 above the door label.
Last edited by 1stq7; 01-22-2017 at 05:20 PM.
#9
AudiWorld Super User
Also normal pressure is 32 front 32 rear for the Q7. For max load it is 32 front 35 rear.
EDIT: I see you edited your post.
#10
AudiWorld Senior Member
According to the Owners Manual for the 2017 Q7, here are the manufacturer recommended tire pressures:
For Normal Loads (i.e. Up to 3 people):
For Maximum Loads:
As SuperSwiss mentioned in his post above, the maximum tire pressure on the tire's side wall is the maximum cold pressure the tire can handle. 50 psi is way too much tire pressure!
For Normal Loads (i.e. Up to 3 people):
255/60-R18 (All Season) F/R: 32/32 psi
255/55-R19 (All-season) F/R: 32/32 psi
285/45-R20 (All-season) F/R: 32/32 psi
285/45-R20 (High-Performance) F/R: 32/32 psi
285/40-R21 (High -performance) F/R: 32/32 psi
255/55-R19 (All-season) F/R: 32/32 psi
285/45-R20 (All-season) F/R: 32/32 psi
285/45-R20 (High-Performance) F/R: 32/32 psi
285/40-R21 (High -performance) F/R: 32/32 psi
255/60-R18 (All Season) F/R: 32/35 psi
255/55-R19 (All-season) F/R: 32/35 psi
285/45-R20 (All-season) F/R: 32/35 psi
285/45-R20 (High-Performance) F/R: 32/35 psi
285/40-R21 (High -performance) F/R: 32/35 psi
255/55-R19 (All-season) F/R: 32/35 psi
285/45-R20 (All-season) F/R: 32/35 psi
285/45-R20 (High-Performance) F/R: 32/35 psi
285/40-R21 (High -performance) F/R: 32/35 psi