tire pressures.

kedin900 · Aug 2, 2013

have a Case 900 with 18.4-34 tires full of fluid. going to try tractor pulls for the first time. i know as track conditions vary so does tire pressure. They have 8 pounds in them now, is that too little?

dej(Jed) · Aug 2, 2013

(quoted from post at 06:22:48 08/02/13) have a Case 900 with 18.4-34 tires full of fluid. going to try tractor pulls for the first time. i know as track conditions vary so does tire pressure. They have 8 pounds in them now, is that too little?

Rule of thumb is that you should run the equivalent psi of the class you are pulling in. 6000 run 6psi---8000 run 8 psi -etc.

John T · Aug 2, 2013

I cant answer your question (sounds low??), but when I pulled it was my belief and experience if the tire was underinflated it squatted and curled/buckled the tire to the point the lugs/raised treads couldnt bite into the track. It was like the smooth and non tread shoulders formed the "to track" surface versus more raised tread area as if it was inflated a bit more???????

THAT MAKE ANY SENSE LOL

NOTE this was NOT hot rod pulling where they have a reason to use cut tires, this was more stock antique pulling

John T

dej(Jed) · Aug 2, 2013

(quoted from post at 06:22:48 08/02/13) have a Case 900 with 18.4-34 tires full of fluid. going to try tractor pulls for the first time. i know as track conditions vary so does tire pressure. They have 8 pounds in them now, is that too little?

Why don't you ask your question over on the Pulling sight.
If tehy can't tell you , no one can.

showcrop · Aug 2, 2013

(reply to post at 06:22:48 08/02/13) [/quot

It depends on the track. Where I hooked Sunday the track was relatively soft so whenever someone spun their tires they sunk down in. In that situation you need your tires to be able to dig aggressively which requires that they maintain their cross sectional curve. Where I hooked on Wednesday, no one was digging into the hard track so you want more tire footprint so you want it to squat so you want less pressure.

jim johnson · Aug 2, 2013

dej{Jed} you're probably not going to win many pulls with that chart of yours but I'd bet on ruining some older tires with it.

Jim

Anonymous-0 · Aug 2, 2013

It takes some trial and error but what you need to do is make a pull, I'd start out with about 12 to 14 LBS, and after you pull and drive ahead look back at your hole you dug at the end, you want it to be flat across the bottom. If it's rounded out you have too much air and if it's rounded up you have too little air pressure. A lot of the farmers years ago thought you needed as little pressure as you could get away with but that's not the case, when you see tires wrinkling all you're doing is pulling on the outside edge and not the whole tread.

Jim

Konnor B · Aug 5, 2013

I run short Bar long bar tires 15.5-38 on 14 inch rims and i run 7.5 pounds

tire pressures.

kedin900

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