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Old 02-12-2014, 10:07 PM   #1
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How to calculate total load capacity for my new Toyo's

I put a set of the Toyo M154 L rated tires on my coach this weekend. Well, actually had to swap out the Toyo M122 J rated tires because the seller goofed up and sold me the wrong speed rating of J.

Tire size and specs:

245/75R22.5 G 14 ply 134/131L

4675 lbs single / 4300 lbs dual at 110 psi / 110 psi 561 revs per mile

How do I calculate what this spec will carry at max?

Is it 4675 x 2 for the fronts and 4300 x 4 for the rears at 110 psi?
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Old 02-12-2014, 10:38 PM   #2
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Quote:
Originally Posted by Bad Bolt View Post
I put a set of the Toyo M154 L rated tires on my coach this weekend. Well, actually had to swap out the Toyo M122 J rated tires because the seller goofed up and sold me the wrong speed rating of J.

Tire size and specs:

245/75R22.5 G 14 ply 134/131L

4675 lbs single / 4300 lbs dual at 110 psi / 110 psi 561 revs per mile

How do I calculate what this spec will carry at max?

Is it 4675 x 2 for the fronts and 4300 x 4 for the rears at 110 psi?
You got it.
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Old 02-12-2014, 11:02 PM   #3
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OK, my coach GVWR is 24,850 lbs

Tire max load range is 26,550 lbs at 110 psi all around

My UVW is 21,900 lbs
My NCC is 2,950 lbs
My CGWR is 28,850 lbs

This gives me about 1,700 lbs on the positive.

However, how am I affected for flat towing a vehicle? Is there a calculation for this?
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Old 02-13-2014, 12:19 AM   #4
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I would think it would only be the weight of the tow equipment which isn't much. It would not be the same as if your were towing a TT with heavy tongue weight. Maybe someone else may elaborate further if I'm not correct.
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