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Originally Posted by Chilibit
I am guessing that the heat cycling has ONLY to do with heat and not any other scrubbing action. Can it be done with warmers or an oven? How does Tirerack do this? They must just heat them. How hot? Tub of 150 degree water? Why are they not shipped from the manufacturer heat cycled?
Ciao,
Chilibit
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Nope, there is a specific pattern of fitting tires to wheels and then wheels to car (different for FWD and RWD), see:
http://rogerkrausracing.com/fit.html
...and scrubbing is loosely used to actually mean the same thing as heat cycling. The heat cycling breaks the bonds of unevenly aligned and weaker molecules of rubber and the secret of heat cycling is actually the rest period or relaxing, because the molecules rebuild and realign, but in a more uniform pattern that could be unique to the car's weight and suspension geometry (don't quote me on that one) But theoretically, a counterclockwise track with a lot of LH sweepers will break the molecules more on the outside of the rf and rr tires, and on th insides of the lf and lr tires. In effect, after relaxing, the properly heat-cycled tires will have stronger sidewalls where you need them. The heat cycling that tirerack or discount tire does really isn't good enough IMHO. I believe they do it on a balancing machine that has another roller that applies force and pressure on the treads of the tire as they spin it for 15 mins., not enough time and lacking in diagonal and stop/go forces like in a couple of laps around the track.
Manufacturers don't heat-cycle the tires because of the time it involves. That would jack up the prices of the tires to unmarketable levels.
