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Unread 07-16-2013, 10:24 AM   #1
Bmann412
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1998 TJ Wrangler 
 
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33x12.50 bfg km2 tire pressure

what pressure should I have my tires at for on road use? Right now they are at 35 psi.also what psi should I air them down to for off road? I don't have beadlocks so I am assuming I can't air them down to far

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Unread 07-16-2013, 10:28 AM   #2
WXman
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How heavy is your Jeep?

I had 33x12.50-15s on my JK for a while and ran them at 25 PSI for the best contact patch. You need to see how heavy your Jeep is, then see what the total of the load capacity of your tires is. Then you'll know what percentage of their capacity you are using and you can set your PSI accordingly. Most guys will need 20-30 psi for the road depending on configuration of your vehicle.
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Unread 07-16-2013, 10:31 AM   #3
Bmann412
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Not really sure the weight of my jeep but its a 4 cyl jeep tj
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Unread 07-16-2013, 03:25 PM   #4
Redneck92
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For on the street I would do a chalk test to see what produces the most even wear. For offroad if you have 10 wide wheels I'd go down to about 15 psi if you have 8 wide wheels I'd go down to 12 psi.
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Unread 07-17-2013, 07:07 AM   #5
medijeep
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Quote:
Originally Posted by Redneck92 View Post
For on the street I would do a chalk test to see what produces the most even wear. For offroad if you have 10 wide wheels I'd go down to about 15 psi if you have 8 wide wheels I'd go down to 12 psi.

agreed.

I've found that on my 35" KM2's on 8 inch rims that 27 psi is the magic # for street. And 10-12 psi for off road. We do a lot of wet rocks up here. Never popped a bead so far.
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