10%??? How abut 15%?
For the past 25 years, the major tire manufacturer I worked for has insisted that they will not supply a tire to any vehicle manufacturer who specs the tires at more than 85% of its rated capacity. That was based on a survey of our internal records of tire returns and the published specs of the vehicle those tires were supplied to. What we found was when a vehicle manufacturer spec'd tires no more than 85%, the failure rate was almost non-existent. This was prompted by a problem we had with an RV manufacturer.
This was confirmed by the Ford/Firestone situation shortly thereafter and it appears that other tire manufacturers and other vehicle manufacturers had similar experiences, because AFTER the Ford/Firestone thing, vehicle manufacturers started specifying larger tires.