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03-17-2013, 09:24 AM | #1 |
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Psi question for aftermarket tires
I just got a new set of tires and wheels and I'm not sure what pressure to set the tires at(previous owner didn't know). The tires are 255/35 on 9.5x19 and 305/30 on 11x19.
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03-17-2013, 11:01 AM | #4 | |
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03-17-2013, 02:02 PM | #5 | |
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03-17-2013, 02:06 PM | #6 |
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agree and will also have to follow your tread wear as you go to see if they are over or underinflated.
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03-18-2013, 07:20 AM | #7 | |
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03-18-2013, 11:10 AM | #8 |
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I would have to say this. Larger tires need less pressure to carry the same load. Try to see it from the extreams; imagine mini tires trying to carry the load, then with tractor tires same load.
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03-18-2013, 04:54 PM | #9 | |
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For the OP: in your case, since the tires are slightly bigger than the originals, the original pressure should be fine. The recommended pressures have to ensure proper load bearing capacity, and beyond that are set to give the manufacturer's desired handling balance and ride feel. If you don't need to add more pressure to carry the weight, I would start with keeping the same pressure. For general tire pressure tuning: To test if you are over- or under-inflated, you can put some chalk stripes across your tires' tread and drive around a parking lot a little bit. Is the chalk wearing off evenly across the large majority of the molded tread? If yes, you're OK. If the middle 1/3rd or so is going away first, take out some pressure. If the edges are going away first, add some pressure.
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03-18-2013, 07:07 PM | #10 | |
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