When it comes to changing their tyres, drivers almost always ask themselves the same question: is it possible to fit different tires to the front and rear of the car? If you ask yourself the same question, find our analysis in this article.
Can you fit different tires on your vehicle?
Following thearticle 3, point 3.2 and 3.3 of the Highway Code« it is forbidden to mount different tires on the same axle, whether they are single wheels or twin wheels “. However, thearticle 9 of the law states that it is possible to mount them on the same axle in the case of a retread, provided that the tires are both of the same:
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- Marque ;
- Dimension ;
- Category of use;
- Structure (diagonal or radial);
- speed code;
- Load capacity indices.
In addition, when changing tires, it is possible to install a retreaded tire or not retreaded, provided that they have the same strain or that they are retreaded by the same manufacturer. It should be noted that all these measures are applicable for tires created since 1is January 1995 which are fitted to new cars put into service from the same date.
Is it possible to mount different tires on the two axles?
The regulations authorize the fitting of different tires on the front and rear axles, if however they are the right size. On the other hand, it is forbidden to combine tires of different structures. THE Traffic Laws also allows driving with front and rear tires that display different speed and load indices. However, these indices must be equal to or greater than the figures prescribed by the manufacturer. Furthermore, to enjoy the best consistency on the two axles, it is necessary that the tires are identical, whether those at the front or at the rear. This affects the safety of the driver and that of the passengers.
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Mounting tires of different sizes on the same axle: is it feasible?
It is entirely possible to mount tires of different sizes on the same axle on the sole condition that the vehicle is not fitted with a staggered mount, namely tires of different sizes on the front and rear. On the other hand, this divergence will be underlined on the report during the technical control. Therefore, the car will have to pass a counter-visit. However, regardless of the case, it is not recommended to fit tires of different sizes if the vehicle is not fitted with offset fittings, as this might disturb its driving. This approach can even make driving risky.
What regarding fitting different tires on 4×4 cars?
For vehicles that have a permanent four-wheel drive (4 x 4), the tires must necessarily be identical. They must then be similar in terms of brands, models, dimensions, and speed and load ratings. Therefore, if one of the tires is punctured or worn, it is necessary to renew all 4 at the same time. If this requirement is not respected, certain elements of the transmission may be damaged and thus lead to a potential reduction in the performance of the vehicle.
