Re: (ET) Tire Chains

["Geof Thompson" <geothompson xplornet com>]

Hi All
I am in the take the Wheel and deflate off camp. But I take it one step 
farther.  Once the wheel is off I take it inside let it warm up to room 
temperature, then mount the chains<which are also room temperature with the 
wheel on my work bench.  So, I am working bare handed at waist level. It 
might seem that this is a lot of work but in the end it is worth it, because 
I can take my time and do it right without have to work on the cold floor 
and minimal frustration and pain to my knees and lower back.

With respect to traction. The very physics that make a tractor good at 
pulling forward are what undoes it when you backing up, That is to say when 
you going forward the drive wheels provide force in both the forward 
direction and downward direction. For you Physics types the vector is more 
or less pointing from the rear axle to the front wheel. The tractor pushes 
itself down. In reverse the vector  rotates 180 degrees, so the rotation 
actually lifts the tractors, or reduces the down force on the drive wheels, 
add a slippery surface and  your going no where.  The answer is chains, 
because the give you more bite, almost like the teeth in a gear.

Long story short, if the wheel spin you lots the battle.

Cheers
Geof