Originally Posted by OurGL (Post 134775)

Siping - they try to persuade you to put extra cuts in the tread using their cross slicing machine to keep the tires cooler and last longer etc etc. Pure nonsense, like nitrogen, designed to pad the bottom line.

I do make a point of requesing an 80% mix when this is offered which usually gets a 'sorry sir, we don't have anything like that available...'