Revo Tire Pressure
- Thread starter slyangel9
- Start date
Register to hide this ad
kullenberg
New member
I run mine at 38 psi, and now have 19k mi on them with little wear :awais:
Ilovesnow
New member
Not to beat a dead horse...
I was just surfing around the forum and came upon this thread, decided to throw in my 2 cents in case anyone cares.
When I had my Dunlops, the computer would regularly show between 19-20 MPG for regular, around town driving (a lot of stop and go).
When I had my REVO's installed, the shop installed them to factory specifications - 32 PSI all the way around (note that I stayed with the stock size 265/65/17 for my REVO's).
For the first couple of weeks, I noticed a drop in my MPG's... computer was showing mid 17's for around town driving.
My wife, who is not at all car savvy, said that the tires looked underinflated to her.
I filled up the REVO's to 38 PSI all the way around... and after about a half tank of gas, the computer is showing 19.3 MPG... not to mention, the tires look fuller and the ride is great.
Long story short, 38 PSI seems to be the magic number for me!
I was just surfing around the forum and came upon this thread, decided to throw in my 2 cents in case anyone cares.
When I had my Dunlops, the computer would regularly show between 19-20 MPG for regular, around town driving (a lot of stop and go).
When I had my REVO's installed, the shop installed them to factory specifications - 32 PSI all the way around (note that I stayed with the stock size 265/65/17 for my REVO's).
For the first couple of weeks, I noticed a drop in my MPG's... computer was showing mid 17's for around town driving.
My wife, who is not at all car savvy, said that the tires looked underinflated to her.
I filled up the REVO's to 38 PSI all the way around... and after about a half tank of gas, the computer is showing 19.3 MPG... not to mention, the tires look fuller and the ride is great.
Long story short, 38 PSI seems to be the magic number for me!
G.I.G.
New member
I run my Revo's at 36psi for normal driving around town. I originally had the tire shop set them to 38 or 40 psi (can't remember which) but the ride seemed a bit too stiff and bouncey for me. 36psi seems to be the right combination of ride quality, traction, and gas mileage for me.
slyangel9, just out of curiosity, do you have the P rated or LT rated Revo's? From what I have heard, it is better to run LT rated tires at higher PSI. I have the P rated Revo's FWIW.
slyangel9, just out of curiosity, do you have the P rated or LT rated Revo's? From what I have heard, it is better to run LT rated tires at higher PSI. I have the P rated Revo's FWIW.
martini
New member
I'm interested in hearing some feedback about this method: Jeep Commander Forums: Jeep Commander Forum - View Single Post - Does Tire Pressure Change with Larger Tires?
I did the calculations out and they seem right for the stock tires matching the door sticker of 32PSI, so now that I've changed tires and sizes here's what the same calculation shows.
Dunlop AT20 (265/65/17)
Max Load 2337 at 51 PSI
4 * 2337 = 9348
9348 / 6005 = 1.556702747710241 (gross vehicle weight)
51 / 1.556702747710241 = 32.8
Cold PSI = 32.8
----------------------------------------------------
Bridgestone Dueler Revo 2 (265/70/17)
Max Load 2535lbs at 44 PSI
4* 2535 = 10140
10140 / 6005 = 1.688592839300583 (gross vehicle weight)
44 / 1.688592839300583 = 26
Cold PSI = 26
The reason I've looked over this again is after a road trip I noticed the edges of my rear tires were not touching the pavement. From the drive the rubber was a slightly different color where the tire had been contacting the ground and a darker black along the outsides where it hadn't been touching the ground. To double check I took a piece of paper and could slide it under the edge of the tire where it should be contacting the ground and it would go in about 1cm. This is with the tires inflated to 36.5 PSI cold at 70 degrees, so it being a hot day near 100 and driving 3 hours I know the pressure was from the ambient temperature alone around 40 PSI. I've been working on slowly lowering my pressure now by 1 PSI at a time and doing the chalk test to find a better pressure.
While I would never run 26 PSI, but does this calculation method seem accurate for pressure since the load rating is higher on the revo's than the at20's?
Thanks.
I did the calculations out and they seem right for the stock tires matching the door sticker of 32PSI, so now that I've changed tires and sizes here's what the same calculation shows.
Dunlop AT20 (265/65/17)
Max Load 2337 at 51 PSI
4 * 2337 = 9348
9348 / 6005 = 1.556702747710241 (gross vehicle weight)
51 / 1.556702747710241 = 32.8
Cold PSI = 32.8
----------------------------------------------------
Bridgestone Dueler Revo 2 (265/70/17)
Max Load 2535lbs at 44 PSI
4* 2535 = 10140
10140 / 6005 = 1.688592839300583 (gross vehicle weight)
44 / 1.688592839300583 = 26
Cold PSI = 26
The reason I've looked over this again is after a road trip I noticed the edges of my rear tires were not touching the pavement. From the drive the rubber was a slightly different color where the tire had been contacting the ground and a darker black along the outsides where it hadn't been touching the ground. To double check I took a piece of paper and could slide it under the edge of the tire where it should be contacting the ground and it would go in about 1cm. This is with the tires inflated to 36.5 PSI cold at 70 degrees, so it being a hot day near 100 and driving 3 hours I know the pressure was from the ambient temperature alone around 40 PSI. I've been working on slowly lowering my pressure now by 1 PSI at a time and doing the chalk test to find a better pressure.
While I would never run 26 PSI, but does this calculation method seem accurate for pressure since the load rating is higher on the revo's than the at20's?
Thanks.
JB.
New member
An easy rule of thumb (for P tires) to save all the calculations is one psi per one increment of load index, so 29 in the new tire is equivalent to 32 for the OE tire (load index 110 to 113).
Larger tire equals more load capacity <a href="http://www.toyota-4runner.org/general-discussions/110299-lt-tires-need-more-air-pressure.html" target="_blank">(3rd graphic)</a> so from that specific standpoint, pressure can be lowered to compensate, but there's more to consider. On this subject, <a href="http://www.toyota-4runner.org/general-discussions/110300-ask-tire-engineer.html" target="_blank">this</a> tire engineer says if you can match the door sticker load capacity with a lower psi, you should still use door psi to match the original tire spring rate.
As an initial guiding principle, higher tire pressures result in fewer wear problems than lower ones so it's better to err on that side. I can tell you from much reading from the above engineer, that he's not fond of the chalk test and is overall pretty uninterested in trying to determine anything by measuring foot prints. For one thing, drive tires and steer tires wear different parts of the tread so looking at a static tire doesn't tell you a lot. <a href="http://www.toyota-4runner.org/performance-zone-tires-wheels-exhaust-superchargers-more/40803-lt-vs-p-inflation-article-2.html#post648814" target="_blank">My own </a>experience with the business card test was unconvincing.
The best proof comes with time and wear patterns. If it were me, I'd run 32 or more psi.
Last edited:
Similar threads
