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I am putting these regular all terrain road tires on the 2007 AC 650 ATV that I inherited from my father who passed away. I have never owned an ATV before and I am a bit lost on what sort of tire pressure I should be running in these tires regularly. I know this will vary based on terrain some (i.e. sand, rocks, etc.). These tires are normal 27x8.5R14 tires all terrain and I want to make sure I am airing them up appropriately.

Thanks.
 

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5 psi
 

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I think this is going to be a case of trial and error. While AC usually specifies 5 psi for their ATVs, these are actual truck tires and running these at 5 psi for a long time may damage them. I would contact Kumho and ask them what the minimum recommended pressure is for them. I didn't see any spec on their website other than the max of 50 psi. Here's a review were they aired them down to 10 and 8 psi on a Jeep: https://www.fourwheeler.com/how-to/wheels-tires/154-0803-kl71-tires-kumho-road-venture-mt/
 
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