rubberlegs
back country campers
Hey "Taco around the world", you might want to weigh each axle at a truck weigh station. We have several in Washington state, for example.
On ours, the front axle load is about the same as our empty truck, 2700-2800 lbs or 90-94% of Toyota's rated front axle load.
But the rear axle load empty was 2000 lbs, with the camper 3100-3600 lbs depending on extra stuff, one to three people, etc. It's 95% to 110% of Toyota's rear axle specs.
If you look at the pressure tables here, the rear tires should be at quite a higher pressure than front, to maximize tire life at high speed, because they are loaded quite a bit more. The tires build up heat if pressurized too low. It's surprising how much more pressure they recommend for just a little more load. Read the link for how to use the table, but you can get an idea from the change in the numbers. In my case I use 45psi front, 55 rear. I probably should use 42 front, 62 rear at my highest weights, if I followed the method exactly.
I was really surprised how much different the pressures should be.
From the top of page 21 at https://www.toyotires.com/media/2125/application_of_load_inflation_tables_20170203.pdf
35 40 45 50 55 60 65 70 75 80
LT275/70R17 Single 2000 2195 2380 2600 2760 2925 3085 3120 3160 3195
RC Pilot Jim, your pressures seem too low, especially the rear. However, if you drive slowly, then you won't damage the tires. I can't find the data on speed vs. pressure unfortunately.
On ours, the front axle load is about the same as our empty truck, 2700-2800 lbs or 90-94% of Toyota's rated front axle load.
But the rear axle load empty was 2000 lbs, with the camper 3100-3600 lbs depending on extra stuff, one to three people, etc. It's 95% to 110% of Toyota's rear axle specs.
If you look at the pressure tables here, the rear tires should be at quite a higher pressure than front, to maximize tire life at high speed, because they are loaded quite a bit more. The tires build up heat if pressurized too low. It's surprising how much more pressure they recommend for just a little more load. Read the link for how to use the table, but you can get an idea from the change in the numbers. In my case I use 45psi front, 55 rear. I probably should use 42 front, 62 rear at my highest weights, if I followed the method exactly.
I was really surprised how much different the pressures should be.
From the top of page 21 at https://www.toyotires.com/media/2125/application_of_load_inflation_tables_20170203.pdf
35 40 45 50 55 60 65 70 75 80
LT275/70R17 Single 2000 2195 2380 2600 2760 2925 3085 3120 3160 3195
RC Pilot Jim, your pressures seem too low, especially the rear. However, if you drive slowly, then you won't damage the tires. I can't find the data on speed vs. pressure unfortunately.