Originally Posted By: Nick1994
CapriRacer: One of my biggest questions with the whole new tires front or rear is, what would be the outcome of a car driving on that track with all 4 tires at 4/32" of tread? Would it slide off the track or would it go through it fine?
The 4/32nds tires CAN hydroplane. So what would happen is that the WHOLE vehicle would skid through the water and it would continue spinning even when it exited the water. The amount of spinning would be less than the front new/rear worn situation, but there would be a slight spin starting to take place. So if your point is that the worn tires are the problem - point taken!
Originally Posted By: Rand
Is that relevant if the "old tires" are worn 1/32 of an inch?
Why put the new tires in the rear in the specific case of the OP.
The "old tires" are less worn than if he had bought all 4 tires and just not rotated for 10000 miles.
Opps, I forgot to add something.
Michelin did a whole serious of tests that they didn't publish, but reported on at some RMA (Rubber Manufacturers Association) meetings I attended. Their testing said that tires within 1/32nd were not significantly different in traction levels, while 2/32nds was measurable.
So in the OP's case, 6K is not likely to have worn 2/32nds, so for practical purposes, it doesn't matter if the tires go on the front or the rear.
The point in my lengthy post was to refute those with "opinions" by using my "experiences".