Taken and reworded from another forum about 'tire stretching' :

Tire distributors constantly place an enormous amount of effort, research, money, etc into the credibility that the industry, as well as customers bestow on them.



It would deflate/defeat that reputation by stepping outside the Tire Manufacturers recommendations for given rim width specification range. Regardless of whatever the current/latest "style" happens to be. Their position will continue to be to adhere to that which the USA Tire Manufacturers Tire Specifications/recommendations are.



For any given tire that most companies sell, if you look at (any of), the tire you'll find the Rim Width Range recommendations. All of these specs are supplied by the individual Tire Manufacturers.



Bottom line-I don't know why anyone would second guess the highly

trained "Rubber" Engineers, employed by the Tire Manufacturers.


ALL threads referring to 'tire stretching' will be locked in Wheel and Tire.


The process is unsafe and it does not benefit anything to the performance of the vehicle.

 

Incidentally, the reason it's unsafe is that, when tires are mounted on rims that are wider (or narrower) than the rim widths approved for the model and size tire, heat and stress can build up in the sidewall, leading to tire failure (either popping the bead or an actual blowout). The engineers and customer service staff of the tire manufacturers hear about this constantly, because users who "stretched" their tires then file claims under warranty. These claims are then denied by the tire manufacturers as a matter of user error (improper usage), and the customers get ticked off and then start fighting with the tire store that mounted them (even though any conscientious tire store will refuse to mount the tires on rims that are too wide). Talk to the folks from the tire manufacturers and watch them roll their eyes at the mere mention of "tire stretching", because they've already dealt with so many cases where the tires failed as a result.

This is NOT a matter of opinion; it's a matter of fact. Tires can, and do, commonly fail as a result of mounting on wheels that are too wide. DON'T DO IT.

 

Since unsafe advice continues to be posted, such threads may be DELETED and INFRACTIONS may be imposed on those who continue to post about this.