Look at WWII jeeps and their "skinny" tires.

[rupert14]

He sat in it (he rides with me in my white TJ in front of the flattie, strapped in his seat) and decided to get a drink out of the styro ice chest in the back of the flattie. After chugging it, I turned around and took that shot with my camera on my phone. I asked him what he was doing and he said "going on sarge, he is used to it". He may know something I don't. I like jeeps but don't pretend the quality is up to the Yota.

Chalk this up as one more use for skinney jeep WWII tires.

[pathrat]

Air2air previously said:

Those guys are of course NOT offroaders and kept me out of offroad for a long time because I thought they represented the breed.

Once you get out there on the trails, you won't see them again. Until your next Hooter's visit.

Well done! We started cracking up when we read this one! Count me in with that past representation too...Bubba with his Big Truck to me just screamed ignorant with something to prove.

[TruckWorkz]

pathrat previously said:

Well done! We started cracking up when we read this one! Count me in with that past representation too...Bubba with his Big Truck to me just screamed ignorant with something to prove.

seems to me that everyone has broken this into two sections of wheelers when in fact their are really three.

Street queens - nothing wrong with them. Depends what someone wants. Me personally I like the look. Full size truck, 40" tires and 12" lift.

Then you have the older jeeps with skinny tires which are how an FJ comes stock... and jeeps too in a sense...

Then you have a really built rock rig. 37-40" tires, 15" wide, and can go mostly anywhere. This is the bigger tire vehicle i think the original poster ws talking about.

[layonnn]

woooody previously said:

So DECREASING normal force INCREASES coefficient of friction. This is opposite of what the expedition article indicated.

Being that i have a degree in physics, i can say beyond a shadow of doubt that this statement is wrong.

Frictional force = coefficient of friction * normal force

coeff. of friction is dependent b/w the two materials, say rubber and concrete have a great coeff. then ice and rubber

Normal force is the force the ground exerts back. For most horizontal circumstances, this is the weight

The coefficient of friction depends nothing on the normal force.

[tibaal89]

layonnn previously said:

The coefficient of friction depends nothing on the normal force.

Uh oh... here comes this arugment!

I will argue that it depends on the normal force, but you have to use your imagination...

What if the truck weighed so much that the pressure caused a solid-solid phase change? Then there would be a new coefficient, eh? neeneeeer

[layonnn]

tibaal89 previously said:

Uh oh... here comes this arugment!

I will argue that it depends on the normal force, but you have to use your imagination...

What if the truck weighed so much that the pressure caused a solid-solid phase change? Then there would be a new coefficient, eh? neeneeeer

I didn't think we were talking about 8ton+ rigs. If the pressure is so great that it melts the rubber, just from sitting on it? is that what you are asking? Im pretty sure my bfg's coefficient doesn't change very much on the trail. Slightly though due to rubber being hot or not. But, that doesn't deal with the normal force on the tire.

[tibaal89]

layonnn previously said:

I didn't think we were talking about 8ton+ rigs. If the pressure is so great that it melts the rubber, just from sitting on it? is that what you are asking? Im pretty sure my bfg's coefficient doesn't change very much on the trail. Slightly though due to rubber being hot or not. But, that doesn't deal with the normal force on the tire.

Man, way to go with the joke. You must be one of those physics people.

I think to cause phase change we're talking about a truck that's a weee bit more than 8 tons, too. I just wanted to throw in what I was hoping would be a funny challenge to your "beyond a shadow of doubt" stance... I have defeated your theory!!! Onward to my victory!!!

[BellyDoc]

tibaal89 previously said:

Man, way to go with the joke. You must be one of those physics people.

I think to cause phase change we're talking about a truck that's a weee bit more than 8 tons, too. I just wanted to throw in what I was hoping would be a funny challenge to your "beyond a shadow of doubt" stance... I have defeated your theory!!! Onward to my victory!!!

Now... if your truck rested on 4 DIAMONDS instead of tires and the points of those diamonds rested on a thin layer of water over a SHEET of continuous diamond... then perhaps you could exert enough pressure to locally create ICE VI. I have no idea what the frictional coefficient of diamond on ice VI is, though...

Is there a physical chemist in the house?

[homedad]

Nerds....

[layonnn]

haha, ive never even heard of ice 6. I know, kind of nerdy. But homedad, come on, when else do i get to talk about physics unless it is already being talked about. Im going do some routing inspection for the scuba driver mod im doing tomorrow morning when my union valve comes in.