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Correct 11.00R20 XL tire pressure

LanceRobson

Well-known member
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206
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Location
Pinnacle, Stokes County, NC
I shot an email to the Michelin commercial tire folks regarding the correct inflation pressures based on my 6 wheel and 10 wheel M35A2s. This was the response. (quick, too!)

Note that they refer to the axle load with 2 or 4 tires per axle. The data is good for other models of trucks, too.

Thank you for your email. We welcome the opportunity to serve you.

We understand that you collect military vehicles. You described a couple of
them, M35A2 6x6 trucks. You inquired about proper inflation pressures for
the Michelin XL tires n size 11.00R20.

In setting your tire pressures, please utilize the following load /
inflation chart:

Inflation pressure (psi) Load Carrying Capacity (2 tires / axle) Load
Carrying Cap (4 tires / axle)

75 10,400 19,960
80 10,900 20,760
85 11,380 21,560
90 12,010 22,700
95 12,410 23,140
100 12,810 23,580
105 13,220 24,020
110 13,740 25,060
115 14,260 26,100
120 14,780 27,120


For additional technical support, please contact our Michelin commercial
truck tire representative in your area:
 
Last edited:

LanceRobson

Well-known member
1,638
206
63
Location
Pinnacle, Stokes County, NC
MORE INFO, 18SEP09. This regards lower weights and off road use.



Hi Lance,

I forwarded your email to our Military Products department; here is a copy
of his response:

If the load per tire is 3000 pounds (6,000 pounds per axle) your highway
inflation pressure should be 43 psi (cold) and mud/sand/snow pressure should
be 23 psi (cold) with the speed being limited to 19 mph. For 4000 pounds
per tire (8,000 pounds per axle), 60 psi (cold) highway, 35 psi (cold)
mud/sand/snow, again with the speed being limited to 19 mph.

I need some pictures!
 

Barrman

Well-known member
5,264
1,779
113
Location
Giddings, Texas
I had my Michelin 11.00's at 50 until I read this thread. I got to thinking about loads and such and went up to 75 on the rears and 85 on the front. (The minimum on the chart way above was 75 psi.) I took it for a 120 mile drive Saturday and about lost all my teeth, my back hurts and my head hit the top a few times. Plus, the steering was super sensitive. I am going back down to 50 on the rears and maybe 60 on the fronts.

Oh, my tread pattern on the ground didn't really change when I upped the pressure.
 
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