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If the wheels are different — when possible and when not

Your car for one reason or another ended up with different wheels. How will this affect the real behavior of the car? And that on this occasion stated in the PDD?

Tale about different wheel familiar to many of us since childhood. Remember, there is a truck with different wheels were unfit vehicle, and therefore was abandoned in the woods? It and is clear: almost always different the wheels of despair.

Disapproved the vehicle with different wheels, even in children’s literature.Disapproved the vehicle with different wheels, even in children’s literature.

The legal aspect

First, remember, refers to the different wheels of the law. To the booklet of Rules of the road always be adjusted back to the “List of faults and the conditions under which prohibits operation of vehicles.” It shows the shortcomings of the cars, which prohibited their long-term operation. With them you will not be able to obtain diagnostic card, required for processing of insurance policy. But to get to the Parking lot or repair with all of the following disadvantages. If there’s a mention of the wheels?

Read. Operation is prohibited if:

“on the same axle of a vehicle fitted with tyres of different sizes, designs (radial, diagonal, chamber, tubeless), models with different tread patterns, frost and non-frost resistant, new and restored, new and with profound drawing of a protector. Vehicles have spiked and posypanny tires.”

So far, so good. And according to the rules and common sense, it is obvious that on one axle wheels and tyres must be the same. But this idyll often breaks… installing the spare tire. Of course, if the trunk is full-sized wheel, then nothing will change, but, unfortunately, there are other options. Namely:

  • you have a summer tire, and it takes place in winter and you have winter wheels

  • your car spare wheel smaller than the other wheels

  • applied stowaway with a narrow tire small size.

Read more about DocuTech we’ve previously reported. By law to drive on them only to the place of Parking or repair. Needless to say, that it is necessary to keep the speed above 80 km/h and to be particularly careful.

After installation dokatki wheels definitely turn out different. Only caution will keep you out of trouble.After installation dokatki wheels definitely turn out different. Only caution will keep you out of trouble.

Conveyor exceptions

Different wheels on front and rear axles are often put on conveyors that produce RWD cars, from the very small smart fortwo and to such as sportivanya Mercedes-Benz, BMW and some others.

There are different wheels “in law”.There are different wheels “in law”.

It is believed that the high torque transfer from the engine better if the rear wheels will have a greater width. Experience sports cars have adopted quite civilian vehicles. For example, Mercedes-Benz C-class last generation even with the most simple engine 156 HP could be equipped with tyres 225/45 R17 front and 245/40 R17 rear wide. Well, this decision has a right to exist, but not to forget that even a full-size spare tire on alloy wheels, these “Cesky” in the trunk of dimensionality, as on the front axle. In which case the incident goes!

All-wheel drive — a complete opposite

SUVs always roll out from the conveyor at exactly the same wheels. Features working all wheel drive transmission require the symmetry of all four wheels.

The spare tire may be required and in the wilderness, and God forbid that it was the right dimension.The spare tire may be required and in the wilderness, and God forbid that it was the right dimension.

In the scheme with a symmetrical center differential (e.g., the Chevrolet Niva) different size wheel will cause it to constant turning and, consequently, wear. The “brains” of today’s complex and clever crossovers are not happy with the wheels, rotating with different speeds. And vehicles with rigidly connected front axle and all will break the transmission, circulation of spurious power and wear and tear on the tires.

Than richer the country the less the probability of “different wheels”. And winter here is a rare…Than richer the country the less the probability of “different wheels”. And winter here is a rare…

Modern system against

At a relatively inexpensive crossover Hyundai Creta in monoprivodnom version control system for tire pressure is very sensitive to the movement of the car with frequent wheelspin. Even with absolutely equal pressure in four tyres the same, it periodically starts to false alarms.

On such roads, even with the same wheels the car asks to check the tire pressure.On such roads, even with the same wheels the car asks to check the tire pressure.

You know what would happen if you put any different wheels on front and rear axle. The same can be said of other systems that compare the speed of the wheels. For any modern car ESP just “go crazy” if the car to put the wheels of differing size.

From despair

Wheels, slightly different in size, you can put only simple front – and rear-wheel drive cars having a maximum of the ABS system or any such systems at all. And it can be done only when necessary to hold on to the end of the season. For example, you stole two wheels and managed to get only contiguous dimension. But always in this mode do not operate any car.

It also happens that when the fatal injury of one of the four tires is not possible to buy the same. For example, because of the removal of this model from production or because stores often imported and sold tyres at best in pairs. Here it is possible to recommend to look for the same bus, used, or buy two new tires of the same dimension. The Council is only suitable for monoprinting cars. Buy a couple of the best the same manufacturer that was before and closest to the tread pattern. The new pair should be put on the front axle regardless of the type of drive.

A simple vehicle with a not very powerful engine and the wheels allowed different.A simple vehicle with a not very powerful engine and the wheels allowed different.

When winter meets summer

The rules do not prohibit the installation of non-studded winter wheels on one axis and year to the other throughout the year, except three winter months. Do that sometimes, if you want to increase the car’s traction (winter tires usually have more pronounced lugs), and splurge on a special off-road tires have neither the money nor the desire. Put more walkable tires on the drive axle, clearly understanding that the car will tend to disrupt this axis, which is especially dangerous on a back drive, but it might be worth the gray hair and in the front.

If the wheels are different — when you can, and when atesli wheels are different — when you can, and when netphoto: “Behind the wheel.Of the Russian Federation”

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