Tips and advice; maintaining your tyres - Fitting tyres: the rules to respect

Fitting tyres: the rules to respect

Maintaining your tyres

Do not attempt to fit your own tyres. Entrust this operation to your specialist tyre centre or dealer. They will be able to rotate your tyres and adjust the balance and geometry of the wheels.

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Fitting a tyre on a rim is more delicate than it looks. It should be entrusted to a specialist who knows the fitting procedure and how to use the suitable equipment. They will pay particular attention to the following points:

  • Complying with the manufacturer's recommendations: structure, size (width, height, diameter), speed rating, load index.
  • Observing the outer and inner aspect of the tyre to detect any anomalies.
  • Respecting fitting procedures: removal, tyre balancing and inflation, valve replacement; not forgetting compliance with fitting instructions (direction of rotation or fitting).
  • Taking into account specific features of some tyres: short sidewalls, run-flat, self-sealing rubber, etc.).

Fitting rules

There are a few basic fitting rules to know if you are fitting new tyres on your car.

If you are only changing a single tyre:

  • It must be of the same profile, dimension and have the same speed rating and load index as the tyre being replaced.
  • The wear difference with the tyre on the same axle must be less than 5 mm.

If you are changing two tyres:

Have the new tyres fitted to the rear axle. Although the front tyres wear more quickly than the rear tyres, numerous tests have shown that it is easier to control the front axle than the rear axle.

By fitting the new tyres at the rear, you will get:

  • better cornering on wet surfaces;
  • increased safety.

Systematically change the valve

Essential for sealing the tyre, the valve gets damaged over time. Under the action of centrifugal force, it suffers deformations that ultimately compromise its function. For this reason, it should be changed systematically when the tyre is replaced.

rezulteo's advice

On fitting, ask for the wheel bolts to be tightened using a torque wrench – and to the torque defined by your vehicle's manufacturer. In this way you will be able to loosen them without dislocating your shoulder if ever you get a flat!