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What tire pressure for a 29.5x10.5x15 ET Drag?

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Old 03-03-2008, 10:51 AM
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Default What tire pressure for a 29.5x10.5x15 ET Drag?

What psi are you guys running in them to get the best results? I am running tubeless with bead locks. Car weighs 3400 lbs.
Old 03-03-2008, 11:02 AM
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What do you have for suspension? That's kind of a very open ended question. I have been able to run between 16 and 23 PSI depending on the track.
Old 03-03-2008, 11:42 AM
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Hal QA1 12-way coil overs up front........HAL QA1 12-way rear shocks with stock springs. Wolfe drag sway bar. BMR full length torque arm set on middle setting and with -3 pinion angle. Madman pan hard bar. Madman control arms. BMR lower and upper front a-arms. Madman SYA bars. Madman travel limiters.
Old 03-03-2008, 07:10 PM
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Tony, what you need that size tire for. I run a 28in tall tire with 1.2x 60fts. I had 29.5/10.5s on mine at one time and I would run 20lbs in them cause I didn't need all that tire. I run 17lbs in my radials
Old 03-03-2008, 08:01 PM
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Just kinda a trial thing. I have 4.10's in the rear. Just wanted to optimize the gear/stall combo. I may go back down to a 28" with 3.70's later but wanted to try this for now. So you think about 18-20 psi?
Old 03-04-2008, 04:15 PM
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I could stand it on the bumper with that much air in the tire. You have to cut the car up pretty good to get them in there. I cut the front and rear and pied it back together. (looks stock) Ran it without minitubs for over a year. Then I got the narrowed rear and had to minitub it. I can fit a 29.5/10.5W under the car without hitting now. Or a 315/60.
Old 03-05-2008, 01:24 PM
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Thanks for the info. I will try 20 psi
Old 03-05-2008, 03:41 PM
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WOW, that's high. I have never been more than 10. I have heard a little higher, but a slick at 20, especially at 9.50. Post up how it goes please.

.
Old 03-05-2008, 04:14 PM
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I ran 10.5 psi in the same tire at 3420 lbs..
Old 03-05-2008, 06:59 PM
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I run 15 psi in my 28x11.5, I am WAY overtired for the track I know. But baby on the street on a concrete bridge it will tote the tires!

David
Old 03-05-2008, 07:29 PM
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on my 29x10s i have to run them about 12lbs any less i would walk really bad on the big end.
Old 03-10-2008, 02:40 PM
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Originally Posted by Z8'S
I ran 10.5 psi in the same tire at 3420 lbs..
I figured some people were running it that low. I had 10.5 psi with that 9.56 pass (no 2nd gear) to a 1.42 60ft. I was thinking upping the pressure but now I am not sure.

Last edited by Tony Shepherd; 03-10-2008 at 02:51 PM.
Old 03-10-2008, 03:18 PM
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Wheel width figures into the psi choice...
Old 03-10-2008, 04:58 PM
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15 X 10 Wheel




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