estesbubba wrote: Does anyone have a link to a chart that gives tire inflation information based on axle load? I've had no luck searching.
Make your own.
On linear graph paper chose a spot for your tire sidewall max PSI & Pounds.
Draw a line from that maximum to zero.
You now have a graph for 'your' tire. Make the 'Y' (vertical) the
weight axis. Make the 'X' (horizontal) the PSI axis.
Mid point on weight will have the corresponding to point for PSI
Here is one I made up for a magazine article wrote on tires. Used a
spread sheet, as wanted a digital copy for emailing to the editor.
Of course you'll have to weigh your setup axle by axle, both empty
and fully loaded so you'll know where you are in reference to the
weighting per axle (divide that by 2 to get what each tire should
be seeing...assumption that the loading is even side to side).
-Ben Picture of my rig
1996 GMC SLT Suburban 3/4 ton K3500/7.4L/4:1/+150Kmiles orig owner...
1980 Chevy Silverado C10/long bed/"BUILT" 5.7L/3:73/1 ton helper springs/+329Kmiles, bought it from dad...
1998 Mazda B2500 (1/2 ton) pickup, 2nd owner...
Praise Dyno Brake equiped and all have "nose bleed" braking!
Previous trucks/offroaders: 40's Jeep restored in mid 60's / 69 DuneBuggy (approx +1K lb: VW pan/200hpCorvair: eng, cam, dual carb'w velocity stacks'n 18" runners, 4spd transaxle) made myself from ground up / 1970 Toyota FJ40 / 1973 K5 Blazer (2dr Tahoe, 1 ton axles front/rear, +255K miles when sold it)...
Sold the boat (looking for another): Trophy with twin 150's...
51 cylinders in household, what's yours?...
Michelin usually has charts with there tires online. If you find your tire size in there list, and find that chart, it will/should be equal to other brands. I seem to recall that the DOT or equal is the one that made the specs, or is it oversee's, such that they do not end up in a tug o war like truck manufactures and tow ratings. Along with making sure that one 245-75-15 tire is equal except for the tech going into it in tire diam, revs per mile, tread width etc.
Marty
05 Chev CC D/A LS Dooley
92 Navistar dump truck, 7.3L 7 sp, 4.33 gears with a Detroit no spin
00 Chev C2500, V5700, 4L80E, 4.10, base truck, no options!
92 Red-e-haul 12K equipment trailer
3 Single axle utility trailers
estesbubba wrote: Does anyone have a link to a chart that gives tire inflation information based on axle load? I've had no luck searching.
What is it you're trying to accomplish that you're not already getting from your door sticker? I'm guessing you're running the stock Bridgestone Rugged Trail's? If so, looking at your setup I'd say you should run your door's max (which should be 60psi front and 70psi rear). If you're concerned about tire wear, I wouldn't worry too much. I've been running those tires for 85K miles and no matter what I do they wear very evenly. But nonethless just measure your tread depth periodically (inner, middle, and outer) to keep an eye on wear.
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