What PSI? 17" Nitto Terra Grappler M/T's - Jeep Wrangler Forum

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Old 09-14-2013, 06:28 AM   #1
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What PSI? 17" Nitto Terra Grappler M/T's

Hey guys,

Quick question -

What pressure do you run in these tires for STREET driving?

I just bought a set of 295/70/17's from Discount Tire Direct and they were delivered at 80 PSI!

I've dropped them to 45, but still need to go lower I think. I'm thinking 35 or so? Maybe less? DTD recommended 45 on their paperwork, but delivered them at 80 so...

It's a load range "E" tire so I know it's going to be a stiff ride, but even at 45, I feel the slightest road imperfection and then tend to be "twitchy".

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Old 09-15-2013, 07:13 AM   #2
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Bueller? Bueller?

No one?

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Old 09-15-2013, 08:55 AM   #3
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They deliver them at max psi for liability reasons. That way if the customer throws them on a 1-ton pickup and has a blowout they can't blame it on low air pressure from the vendor.

You need to figure out what percentage of the tires' overall capacity you are using and then set the pressure accordingly. On a 4,300 lb. JK mine worked out to around 25 psi. Your JK may weigh a different amount and your tires may have a different capacity.
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