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Old May 11th, 2012, 07:05 AM   #21
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I don't see spending 800 for something that will only see minimal use. I only plan on airing my tires down maybe 6 times a year. I will run 12-15lbs and just be careful. Great info
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Old May 11th, 2012, 08:58 AM   #22
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I don't see spending 800 for something that will only see minimal use. I only plan on airing my tires down maybe 6 times a year. I will run 12-15lbs and just be careful. Great info
I woudl think that under noraml sand condition you will have no problem, but if you load the side wall either on a hard turn or force the side wall up against something firm you will force the tire off.


carry a can of starter fluid and matches and a cheap 12v compressor and you will be able to get the tire back on with out a problem.
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Old May 11th, 2012, 09:16 AM   #23
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Don't worry im not the dumbass out there doing doughnuts on 8 psi. Won't be turning hard or climbing. I'm familiar with the sand and low tire pressure, just not 16.5 rims and this big of tire/truck combo. Starter fluid and matches already in stock for this
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Old May 11th, 2012, 09:29 AM   #24
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start high, lower as needed, stop worrying, enjoy dunes
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Old May 11th, 2012, 10:23 AM   #25
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8800 lbs is likely your gross vehicle weight rating, not your weight. They tend to weigh around 5800-7000, depending on cab configuration and engine.
I've had mine on the scale at a scrap yard and it was over 8000 with the bed empty. GVW on f350 is I think 9999
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Old May 11th, 2012, 11:25 AM   #26
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??? That seems pretty low.

If his truck is a 4wd, 4 door diesel with 39.5 tires i would think it weighs over 8k.
My 4x4 4 door long bed v8 dodge 2500 was 5900 lbs. My other 4x4 ext cab long bed 2500 with a V10 and cap was 6700lbs.

Depends on the year but most gasser 3/4 tons are under 7000 lbs.
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Old May 12th, 2012, 04:52 PM   #27
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this chart is a good starting point for any vehicle.



"To determine your optimum sand pressure, perform the following test on a flat, level and smooth surface, fully loaded as you would be for a sand run (gas tank and passengers included). Measure the vertical height to the bottom of the wheel (rim) from the ground. This is your 100%, street pressure, wheel height. Now reduce this height by 25%. In other words, let out air until your wheel is 75% of the street height. Measure and record this pressure and depending on your vehicle and loading scheme, front and rear tires may differ.

This is your optimum sand pressure. As the TREAD FOOTPRINT figure shows, this typically results in more than a 250% increase. That is like having ten tires where you only had four. This pressure is only valid for exactly what you tested. Change vehicle, tires, wheels or load and you have to retest."

you may be able to go less. beat retention really depends on your tire and rim width. not so much the rim or tire diameter.
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Old May 12th, 2012, 05:55 PM   #28
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That's helpful good find!
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Old May 12th, 2012, 07:20 PM   #29
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8800 lbs is likely your gross vehicle weight rating, not your weight. They tend to weigh around 5800-7000, depending on cab configuration and engine.
Meh... My ranger weighed in at right around 4200 last year. If memory serves me right, my dads 06 1500 weighed in at right around 5300. I am sure the f250 weighs a good bit more than that..
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Old May 13th, 2012, 11:30 PM   #30
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8800 lbs is likely your gross vehicle weight rating, not your weight. They tend to weigh around 5800-7000, depending on cab configuration and engine.
My 96 f250 7.3 ext cab on street tires with a quarter tank of fuel and me in it weighed 7530 last time I entered a pull. Make it a crew add two full tanks of fuel and some 39s and 8800 is very believable.
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Old May 29th, 2012, 01:16 AM   #31
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And fyi I ran 2lbs in the rear 8 in the front the whole weekend, tires didnt even squat or lean. They felt super hard the whole time still. Only time I noticed the tire pressure was on the pavement and even then it wasnt bad. Im shocked how firm the tires were. Kinda wish they were a bit softer at times.
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