Man did you open a can of worms. There are two debates on this, first the one I subscribe to coming from an old Jeeping background is low pressure. low pressure actually give better floation as it spreads out the tread of a larger area. Second is the belief you need high pressure to help prevent busting a bead if you hit a rut. Both having their arguments for and against. I haven't had a chance to do it yet but I will at Muddy Gras the end of Jan. I'm going to try the same hole with 18-19 lbs of pressure and again with 3.5-4.5 lbs of pressure and see which works better in the mud.
Are you just mud riding or Mud Racing??? IF your Mud Racing, every Race is different. Some Pits are more Water than Mud and other More Mud than Water. Just depends on the Pit.
i think it depends on weight of the atv, the center of gravity (COG) and of course the tire. small atv i'd run 2-4 psi, mid-size 4-8 psi, big atv 8-12 psi. IMO best bet would be to try different psi in the same conditions and make your own judgement. the terrain is a major factor also, if you ride hard packed dirt trails i'd say more psi.
Last edited by bamajeepjunkie : Dec 20th, 07 at 11:29 PM.
Well with my bike I run around 20 psi when I am mudding. It helps to keep from breaking the bead and also gives me a little more floation in the really deep stuff. But that is just my two cents.
Yea, I'm in a bit of confusion. Yamaha says to run 10psi in front and 14psi in rear of my Rhino. Due to the weight of the machine, they say less pressure risks running one off the bead. Well I bought some new Duro Power Grip Radials for the Rhino, and they say Max 7psi. They are a 6ply vs. the 2ply front and 4ply rear of the OEM's. I'm going out tomorrow, and put 9psi front and 10psi rear. we'll see how it does. I just don't understand why a 6ply Radial says Max pressure 7psi? Anyone know?
One more thing, You also have to remember that they use 30-40 lbs of tire pressure to set the bead of the tire during installation. And In my opinion running a little higher tire pressure is not going to hurt the tire as long as you stay off the concrete. And just a few more pounds to help keep the bead is worth it. Instead of cutting your ridding short due to a blown tire. Ask Crane about getting a tire back on the bead in camp. It is not an easy chore, especially when its not even your bike.
One more thing, You also have to remember that they use 30-40 lbs of tire pressure to set the bead of the tire during installation. And In my opinion running a little higher tire pressure is not going to hurt the tire as long as you stay off the concrete. And just a few more pounds to help keep the bead is worth it. Instead of cutting your ridding short due to a blown tire. Ask Crane about getting a tire back on the bead in camp. It is not an easy chore, especially when its not even your bike.
Getting the bead back on at camp is a whole lot easier than getting it back on at the top of a great bit hill.
Yea, I'm in a bit of confusion. Yamaha says to run 10psi in front and 14psi in rear of my Rhino. Due to the weight of the machine, they say less pressure risks running one off the bead. Well I bought some new Duro Power Grip Radials for the Rhino, and they say Max 7psi. They are a 6ply vs. the 2ply front and 4ply rear of the OEM's. I'm going out tomorrow, and put 9psi front and 10psi rear. we'll see how it does. I just don't understand why a 6ply Radial says Max pressure 7psi? Anyone know?
IMO- the higher ply tire will hold their bead better.
AS long as you ride on a hard road high pressure is fine. If you ride trails with sticks and stobs from stumps of small trees you will be sorry. As you ride up on a pointy stob a low pressure tire will wrap around it and with a high pressure tire it will puncture.
[quote=Fishmstr;36369]Man did you open a can of worms. There are two debates on this, first the one I subscribe to coming from an old Jeeping background is low pressure. low pressure actually give better floation as it spreads out the tread of a larger area. Second is the belief you need high pressure to help prevent busting a bead if you hit a rut. Both having their arguments for and against. I haven't had a chance to do it yet but I will at Muddy Gras the end of Jan. I'm going to try the same hole with 18-19 lbs of pressure and again with 3.5-4.5 lbs of pressure and see which works better in the mud.
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That would be a great test of tire pressure. Wolud like to hear the resaults. I assume the mud is like the sand the lower the pressure the better
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750 Brute, 26" MTRs, overfenders, gorilla winch
I have seena lot come in the Yamaha Dealer with tire busted cause they were running
