See also:

Bead
The tire bead ensures that the tire sits securely on the wheel. There are several steel wires in the bead to prevent the tire from coming loose from the wheel rim. ...

The ultimate in seating comfort allowing adjustments to suit individual ergonomic needs
Refined sportiness - this philosophy applies also to the seats, as they combine the ultimate in seating comfort with sporty lateral support. Four different front seat types are available to choose ...

Tire tread
WARNING Although the applicable federal motor vehicle safety laws consider a tire to be worn when the tread wear indicators (TWI) become visible at approximately 1/16 in (1.6 mm), we recomm ...