Tire Pressure

[wltrmtty]

CAT Scale has a great free app that shows where their scales are located

[JWA]

Originally Posted by wltrmtty

JWA

According to the Michelin article here, under inflated tires will be more dangerous than over inflated tires. I have to assume tire manufacturers take into account the extra 4psi, or so, of inflation after the tire warms up.

Great links to interesting articles.

I've known for a long time radial tires are very prone to sidewall blow out issues when/if under inflated. The Michelin photos are very convincing this can be quite a problem if left unattended.

Also interesting the PSI difference between "hot" and "cold" is only 4PSI---I would have thought much higher. Good to know its not too significant.

Originally Posted by Beasty Boy

A recycle place or a junk yard for a scale.

CAT scales have a benefit of weighing each axle, the scrap yards or even grain mills tend to weigh the entire vehicle. I like the CAT print outs too for my records---they've come in handy from time-to-time in the past.

[Zappo]

I just dropped my 2009 e250 2wd camper van off at Dave’s frame and alignment in Huntington Beach ca to install new front super coils to achieve stock ride height when new since I went from 245 75 16 e tires to 265 75 16 bfg ko2 “dt tread”and need all the height I can get because of sagging oem,bilstien b-6 shocks,fox/weldtec steering stabilizer,airlifted rear air bags with internal jounce and alignment.one other item I’m getting done that a lot of people overlook is repacking the front wheel bearings(put that on your list if you haven’t done it in a while!! ),tires air max 80 psi and I was surprised when he told me to run 80 in front 60 rear.the van has fiberglass top 30” and all amenities from a/c to generator and shower/toilet weighs in at 8060 lbs total 3240 lbs front and 4820 rear.

[wltrmtty]

Originally Posted by Zappo

I just dropped my 2009 e250 2wd camper van off at Dave’s frame and alignment in Huntington Beach ca to install new front super coils to achieve stock ride height when new since I went from 245 75 16 e tires to 265 75 16 bfg ko2 “dt tread”and need all the height I can get because of sagging oem,bilstien b-6 shocks,fox/weldtec steering stabilizer,airlifted rear air bags with internal jounce and alignment.one other item I’m getting done that a lot of people overlook is repacking the front wheel bearings(put that on your list if you haven’t done it in a while!! ),tires air max 80 psi and I was surprised when he told me to run 80 in front 60 rear.the van has fiberglass top 30” and all amenities from a/c to generator and shower/toilet weighs in at 8060 lbs total 3240 lbs front and 4820 rear.

Good suggestion on the wheel bearings. 80psi front and 60psi rear? Are you sure your mechanic isn't dyslexic? I run 225/75R16 which I suspect have a different load range and, therefore, tire pressures. But I do know that tire pressures are directly proportional to tire load. You might want to double check your mechanic's recommendation. Otherwise, I fear you will ruin your rear tires.

[Zappo]

Haha I kinda of feel dyslexic right now because I asked him a second time and this guy has some serious credentials so I didn’t want to ask a third time.the only disclaimer is that it was first thing in the Mornin with 5 people staring at him to drop off their vehicles,I would trust this guy before any kook at the local tire shop that struggles balancing a tire.i will however ask a third time once I pay the bill and I’m driving off so he doesn’t have enough time to throw an old ball joint at my rig haha and I will follow up here...

[wltrmtty]

Zappo, I know what you mean. I'm dyslexic most days. When you ask him a third time, wear a catcher's mask or something. Ha!

[Zappo]

Ok I just talked to dale and he said the reason to run full 80 psi on e rated in front is because it’s on a turning axle which has a lot of effects on different front suspension components and helps with how the tire wears/suspension performs.on the rear he said 60-65 and to old school push the rear bumper from the side with your foot and if it wallows back and forth to add a little air.he did say if your towing and you do not have weight distribution hitch/bars to max it out at 80.he also said that those pressures directly affect how tires wear in middle/sides.im not trying to tell anybody that their settings are wrong just passing along info “food for thought”

[wltrmtty]

Zappo, thanks for the update.

[geoffff]

Originally Posted by wltrmtty

The first link was a pdf for Toyo tires inflation ranges. I said, "This is for Toyo tires. Would you like me to extend your sincere thanks and gratitude to Toyo tires for doing your job for you?"

I have found that the Load/Inflation tables from all manufacturers list the very same PSI load ratings. It depends only on tire size. Some books do include additional tire sizes/loads. For example, tire size LT285/75R16 in single (not dually) configuration:

35   40   45   50   C 55   60   65   D 70   75   80   E  PSI
2130 2340 2540 2755 C 2925 3110 3305 D                   2004 Tire and Rim Assoc.
2130 2340 2540 2755 C 2925 3110 3305 D                   2002 Goodyear
2130 2340 2540 2755 C 2925 3110 3305 D                   2006 Bridgestone
2130 2340 2540 2755 C 2925 3110 3305 D                   2011 Firestone
2130 2340 2540 2755 C 2925 3110 3305 D 3465 3635 3750 E  2007 Toyo

-- Geoff

[wltrmtty]

Thanks Geoff. When I spoke to Michelin, they referenced the Toyo chart.