Tires, How low can they go? |
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Mike S
Member Joined: 20 May 2006 Location: West Coast Status: Offline Points: 2318 |
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A lot depends on the weight of your vehicle, type of tires, and the surface you are driving on. I have aired down the tires of my F350 crew cab 1 ton to 14-15 psi when launching a 4500 lb. boat on a dual axle trailer across the beach in Baja. These tires are Toyo M55s 285-75-R16 load range E.
If you are driving a very lightweight vehicle (like our Jeeps) I expect that you could go to 10 psi - maybe a little less. The more plies in the sidewall, the more lateral support you get, the lower you can air down. The best index might be the percentage increase of the tread width. Going from 6" tread width to 7.5" is probably realistic - try this in your driveway and and see how much you need to air down to get to that width.
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'47 CJ2A -- #114542
Warn FF D41 rear Lock-Right locker 11" drum brakes Dual master cylinder T90C Transmission 16 X 6 Jeep truck wheels Cooper STT Pro tires |
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Mark W.
Member Sponsor Member Joined: 09 Nov. 2014 Location: Silverton, OR Status: Offline Points: 7986 |
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Keep in mind a stock running sad Willys Jeep will climb a hill if it keeps traction steep enough to flip one over. SO if you have no roll bar/cage you best be careful.
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Chug A Lug
1948 2A Body Customized 1949 3A W/S 1957 CJ5 Frame Modified Late 50's 134L 9.25"clutch T90A D18 (1.25") D44/30 flanged E-Locker D25 5.38 Since 1962 |
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jpet
Moderator Group Sponsor Member x 5 Joined: 30 Apr. 2008 Location: Ramsey, IL Status: Offline Points: 11174 |
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Thanks for the input guys. I know there are lots of variables what I am looking for is testimony from someone who has actually tore up a tube because they aired down too low ..... other than a flat
..... or testimony from those who have aired down tubes below 10 lbs with success. Edited by jpet - 02 Mar. 2016 at 1:25am |
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CJ2A #29110 "General Willys"
MB #204827 "BAM BAM" "We do what we can, and we try what we can't" |
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Joe Friday
Moderator Group Sponsor Member x 2 Joined: 26 Dec. 2010 Location: Jeep Central Status: Offline Points: 3655 |
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Jeff- go ahead and run 8 but watch your footprint. Bias tires "oil can" and you will lose traction because the centerline lifts. also, for Moab you don't want to lose axle clearance by airing down too much. It makes the steps harder and you loose grip on side slopes.
I've done 'tire test hill' at 35 psi in 2wd. there is a ton of hype out there.
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willys54wagon
Member Joined: 24 July 2008 Location: Ames, IA Status: Offline Points: 1444 |
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If you read through the pictures here you will see dash instructions of 7 lbs for entering and leaving water, but you knew that from past experience? I would assume the military had done some research on low tire pressure. Edited by willys54wagon - 02 Mar. 2016 at 1:28pm |
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Two jeeps on the road, one is close and the rest are dreams.
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jpet
Moderator Group Sponsor Member x 5 Joined: 30 Apr. 2008 Location: Ramsey, IL Status: Offline Points: 11174 |
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CJ2A #29110 "General Willys"
MB #204827 "BAM BAM" "We do what we can, and we try what we can't" |
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jaksjep
Member Joined: 03 Nov. 2013 Location: Southern CA Status: Offline Points: 471 |
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Contact the tire manufacturer and see what they say???
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My posts are my personal opinion and are not legal advice as I am not an attorney. If you act on any of my comments you do so at your own risk.
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