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Old 05-21-2008, 04:12 PM   #1
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Air Down Pressure?

What pressure do you guys air down to for different roads? For those that don't have compressors built in -- how do you air up again?

Joe
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Old 05-21-2008, 04:53 PM   #2
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I believe the air down pressure depends upon your normal psi. Different size tires have different psi ratings. Also, it depends on the terrain and how fast you will be driving. For what its worth, I'm still running the stock 245/75/16 tires that came with the SMB. I run them at 80psi on the highway. I've aired them down to 35 psi off road, but never went faster than 25 - 30 mph that way.

I use a Viair portable compressor to the air them back up. It has worked great and is pretty comparable in peformance to the onboard compressors. I have a prior post about this in the 4x4 forum.
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Old 05-21-2008, 05:37 PM   #3
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We are running 285-75-R16 tires at 55 psi on the highway. Off-road, I typically air down to 35 psi...this was arrived at through trial and error on the washboard roads in Baja. At that pressure, I'll drive at 35 mph, assuming that the road is safe at that speed of course. We have a frame-mounted Extreme Air compressor to air back up.
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Old 05-21-2008, 05:39 PM   #4
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There are already extensive posts on this subject elsewhere in this Forum. Use the search option and check 'em out.
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Old 05-22-2008, 01:41 PM   #5
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Joe,

Overland Journal reviewed portable air compressors in the latest issue. If you are shopping for one it would be worth picking up a copy. You can purchase from their website www.overlandjournal.com.

John
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Old 05-22-2008, 10:34 PM   #6
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Thanks,

I'll give that journal a try.

Joe
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