Hello all,
I’m a little late to this thread but since I just found it, I’ll add my two cents.
Regarding passenger vehicle tire testing, there is significantly more testing going on than what has been posted above. Besides the basic government standard tests (BTW, these are about to become much more stringent), there is a myriad of internal testing done by the larger tire companies. These include exhaustive ride & handling, noise and durability testing that can be over 80k miles (tracks) as well as countless laboratory machine tests that test tires well beyond what could be deemed reasonably foreseeable in the real world. These higher standards are not limited to the OEM fitments either, so called “trade” tires get the same treatment before final release, although to a lesser extent depending on the specific market. Speaking from personal experience, when a new trade tire project is launched, it generally develops in the same way an OEM project does with pretty much the same steps in development taken along the way.
As far as motorcycle tires are concerned, I’ve not much first hand testing knowledge although I have seen it done and know it regularly gets done at least by the big guys. If I were to decide today on a new set of bike tires and one of my concerns was whether the product had been thoroughly tested, I’d opt for a brand name tire. If on the other hand I had more time, I’d read the latest bike magazines not just for tire tests but also for long term bike tests to get a better feel.
Cheers
Ramon