Here I am

Off Roading Front row 38" blowout @ 90 mph

Attention: TDR Forum Junkies
To the point: Click this link and check out the Front Page News story(ies) where we are tracking the introduction of the 2025 Ram HD trucks.

Thanks, TDR Staff

Competition TRUST for HVAC

Off Roading Question about tires

The other day I was on I75 South just below fort myers. I was cruising at 80 in the right hand lane (2 lanes). A mid 90's chevy gas job with 6" lift and 38" mud tires comes up beside me and slows down (he had been running about 90 mph). I was trying to figure out if I knew the guy when he gooses his truck twice and then backs off to beside me. "THIS GUY WANT'S TO RACE" Well I thought about it but decided better to just let it go (besides my comp is on the fritz and don't have the new one yet). I waive to him "never touching the cruise control" and he speeds back up to approx. 90 mph.



Now it gets interesting... I start to see what looks like smoke from the right rear tire and then the tire swells up like a dragster tire and shakes violently. I am on the brakes hard giving this guy some room cause he is in trouble. The tire then goes flat and pieces of tread start flying and banging into the bed quarter panel. The tire comes off the rim and is propelled through the air across the other lane and into the road ditch like a bouncing ball. The guy is now doing 60-70 and completely on the rim. He used both lanes for a little bit (he needed to change his shorts for sure) before he could get it slowed down and off the road.



Whew! That was a close one. It was an awesome site to watch through my windshield. I believe he had 38" ground hogs on 10 X 16. 5" wheels but can't be sure.



I keep thinking that had I tried to race him I might have ate that tire for lunch.



Wonder what the speed rating is on a 38" ground hawg.



FYI
 
wow that was a crazy story. on my old truck i had 42 inch swampers and traveled going about 85 and never had any problems like that... ...

i never liked fround hawgs they suck... .



did you stop and talk to this guy or what?
 
Tires take more of a beating than anything else on the truck. They are also critical for control. But yet people take them completely for granted. You have to be stupid to run tires like that at 90mph for more than a minute or so at a time. Doing it for miles and miles is a recipe for failure. Heck, he probably had them aired down for the trail:--)
 
Originally posted by CumminFast

did you yell "sucks for you" out the window?



LOL.



I took my Mickey Thompson Baja Belted 36x14. 5. 16. 5 to 143 MPH in Late October. Racing an '02 C6. I'm proud to say he barely pulled a total of ~10 feet on my from 63 to 143. But, I'm not too proud to say that I was going that fast on that tire!



Merrick
 
Hell yeah I dont know about you but 140 mph on 35s is scary! I have done it once and that is the last time. Dang thing bounces all over the road! I thought I was about to take off!
 
I'd be curious to know how accurate the speedo's are that are reading 130-140 MPH with those tires... ..... on 4wd trucks... ... . My truck is bad enough at 85 MPH.



Brian
 
Originally posted by Brayden

What's a C6? Do you mean 2002 Corvette C5?



If so, what bomb's do you have?



I guess it would be a C5. It may have been an '03 (I'm not up to date on them). I got a good look at it since it was the son of the dyno shop's owner. He walked in and told his mom about how "that" diesel truck just raced him on the highway.



My speedo was reading 110-112MPH. My tires have a 30% correction factor.



BOMB's... .

4" lift,

36" tires,

Worked Injection Pump,

5,000+RPM GSK

Laser DV's,

EDM's,

Twin Turbo's,

ATS Transmission.



A few other knick nacks. I installed when I had some money.



It dyno'd only 500ish RWHP that day.

Here's a video, too bad it doesn't have any sound.

http://www.monkey.net/steve/dyno/stacks.mpg

Here's a web page with some pictures,

http://www.monkey.net/steve/dyno/stacks_dyno.htm



Merrick
 
Last edited by a moderator:
Originally posted by MCummings

.



My speedo was reading 110-112MPH. My tires have a 30% correction factor.



Are you sure about that 30% correction factor? My 315/75R16s are only about an 8% correction factor over the stock 265s. I've checked my speedo against my GPS.



Brian
 
'98 12V and 3. 55 gears.

OE 215/??/16 tires.

36" tires now.



I was told by Eric it is a 30% correction. Seems about right. I think.



Merrick
 
The correction factor is ~20% going from a 215/85R16 (dually size?) or 245/75R16 (stock for a 2500?) to a 36" tall tire. Both the 215 & 245 are ~30. 5" diameter so a 6" increase is ~20%. The other thing you need to consider is how inaccurate the speedo/odo is with the stock tires.





Brian
 
Back
Top