Wheel and tire sizes

The relatively small tire-to-road contact area should keep the Fiesta on track regardless of weather or road conditions. In addition to the forces acting on the tires during acceleration and braking of the car, centrifugal forces that occur during cornering are added, which try to move the car in the direction opposite to the turn. In all cases, the tires must be able to withstand the loads acting on them and ensure that the trajectory of movement is maintained. Under normal load, the radial tires on the front drive wheels of a Fiesta can withstand approx. Even if you don't use your car much, you should change your tires every 7-8 years. During this time, dirt, aggressive environmental influences, internal processes and last but not least the sun destroy the tires to such an extent that they can no longer be used. The appearance of an old spare tire is also deceiving: it cannot be used either, despite the fact that it looks like new.

The dimensions of the tires installed on Fiesta cars are given in table. 13.1.

Two versions of Fiesta car wheels

Ford equips cars with two main types of wheels: depending on the equipment and model, steel or aluminum wheels are used. On models since 1996, steel wheel sizes range from 5Jx13 inches to 5Jx14 inches. Aluminum wheels are supplied for all models in the same size. In table. 13.1 shows the wheel sizes that Ford provides as standard or optional equipment for various vehicle models. The tire and wheel sizes approved for your Fiesta are listed in the data sheet. If you want to equip your car with other tires, please consult the service center.




TECHNICAL DICTIONARY

Wheel size

The wheel is indicated by the main rim dimensions in inches. Marked 5Jx13 (in inches) first digit - rim width, letter «J» means the shape of the rim profile (deep base), the last digits are the mounting diameter of the wheel (13 inches). Features of deep base rims: for the tires to sit well, on the landing shelf (shoulder) the rim is provided with a ledge located around the entire circumference. When driving fast in a corner, it prevents the edge of the tire from jumping off the landing shelf (shoulder) at the base of the rim.