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Old 07-25-2014, 05:21 AM   #29
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...snip...
But an increase in load carrying capacity by increasing tire size wouldn't necessarily increase ride harshness (unless the inflation pressure also increases.) In fact, the increased mass of the tire might help the ride harshness.
I'm not sure I understand. Let's say the D is 65 psi max and the E is 80 psi max. If you increased capacity from D to E, would you recommend the E rated tire also be inflated to 65 psi? I thought the idea was for tires on the trailer (whether ST, LT or P) to be inflated to their max. Though I could certainly have that wrong...
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Old 07-27-2014, 07:42 AM   #30
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I'm not sure I understand. Let's say the D is 65 psi max and the E is 80 psi max. If you increased capacity from D to E, would you recommend the E rated tire also be inflated to 65 psi? I thought the idea was for tires on the trailer (whether ST, LT or P) to be inflated to their max. Though I could certainly have that wrong...
But if I move from an ST225/75R15 Load range E to an ST235/80R16 Load Range D, the load carrying capacity increases from 2830# to 3000#, but the inflation pressure goes down from 80 psi to 65 psi, so the ride quality goes up.
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Old 07-27-2014, 11:37 AM   #31
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Just curious, how many have switched to 235/80x16 load range D tires, versus 225/75x16 LR-E tires?

I have 225/75x16 LR-E.

Didn't even consider the 235/80x16, because they were too big (in diameter), and the 225/75x16's were almost identical in size to the OEM GYMs.
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Old 07-27-2014, 12:00 PM   #32
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But if I move from an ST225/75R15 Load range E to an ST235/80R16 Load Range D, the load carrying capacity increases from 2830# to 3000#, but the inflation pressure goes down from 80 psi to 65 psi, so the ride quality goes up.
Thanks. So much to learn!
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