Tire replacement/rotation (Hyundai Elantra J1)

Tire marking

Depending on the year of manufacture, tires have different markings:

In the old markings - for example, 185/70HR14 - the letter designation of the maximum speed (H) is in the middle.

In the new markings - for example, 1 85/70R1 484H - the letter designation of the maximum speed (H) is at the end. A number indicating the mileage of the tires has been added to the marking (in this case 84).

Tyres with the TD code designation retain their running properties even after a puncture, while tyres with the TRX code designation have a metric inner diameter. It is indicated by the number 390 in the tire brand 1 95/60VR390TD or 195/60R390 91 H M + S (TRS). The inner diameter of other tires is measured in inches.



The numbers and letters in the tire markings mean the following:

• 185, 195, 200, 205 - tire width without load in millimeters;
• 55, 60, 65, 70 - the ratio of the tire's height to its width - for example, 65:100. Accordingly, this value is lower for tires marked with numbers 60, 55.
• R - tire type designation: radial.
• 15, 390 is the inner diameter of the tire in inches or millimeters.
• Q - maximum speed of 160 km/h - speed class for regular tires marked M+S.
• S - up to 180 km/h.
• T - up to 190 km/h - high-speed tires M+S.
• H - up to 2 1 0 km/h.
• VR - over 2 1 0 km/h (old but still used marking). It is superseded by the designations V and ZR.
• V - up to 240 km/h.
• ZR - over 240 km/h.
• TD - a class of tires that maintains traction when punctured.

Discs - marking

The numbers and letters on the disc markings mean the following:

• 6, 6.5, 7, 167, 180, 195 - rim width in inches or millimeters (for TRX and TD modification disks).
• J - conventional designation of the side height. X - designation of deep rim.
• 15, 390, 415 - maximum disc diameter in inches or millimeters (from side to side).
• ET 19, ET 20, 6T 22 - rim fitment depth. This size specifies the code designation below. TR - code designation of the TRX type wheel.
• TD is a code designation for wheels that retain their driving characteristics when the tire is punctured.

As you can see from the previous section, there are three different types of wheel rims that can be installed on cars: regular deep-deck rims, TR rims, and TD rims. However, you should know that not all tires are suitable for all rims, and vice versa. A deep-wall rim should be fitted with a regular radial tyre, a TR type rim with a TRX type tyre, and a TD type rim with a TD type tyre.



Currently, most car models are equipped with all-zone radial tires with a steel brake belt as standard equipment. These tires have an average 37% higher snow traction coefficient than conventional road tires previously equipped with cars. At the same time, such properties of tires as grip on wet road surfaces, rolling resistance, service life, and the ability to retain air pressure have been improved. These improvements have been achieved through changes in the tread design and the use of special rubber compounds.

TRX type tires and wheels

The ride will be comfortable if the sidewalls of the tires are high and flexible, and the grip on the road will be improved if the sidewalls are low and rigid. To achieve a compromise between these conditions, the TRX tire carcass was developed, which works equally under tension and compression. That's where the name of the tire comes from "TR" — "tension repartie" (load distribution). Therefore, the shape of the sidewalls of this tire had to be changed, which led to the need to create a new disk.

TD type tires and wheels

These tires have a strongly developed additional bead on the flange, which fits into a deep groove on the edge of the rim. This significantly improves the adhesion of the tire to the rim, preventing the tire from slipping off the rim when punctured.

Even with a punctured tire, the car can be safely driven out of the danger zone. A punctured TD tyre can be held on the front wheel for up to 30 km, on the rear wheel – up to 9 km (if it is leading). However, the speed on turns should not exceed 30 km/h, and when driving straight - 60 km/h. However, even if a tire is unexpectedly punctured at a higher speed, it does not come off the rim - even on turns. The car remains controllable and can be stopped smoothly.

Tire rotation

The tires in each vehicle are selected to provide the best performance under normal conditions.

Uniform wear of tires is ensured by replacing them after every 9 thousand kilometers. By including a regular spare tire in your tire rotation routine, you can increase the life of your tires by 20% or more.



However, it should be borne in mind that studded tires cannot be rotated, and radial tires should only be rotated on the same side of the car on which they were installed (they must maintain the same direction of rotation). The tapes on radial tires are installed in a specific order. Changing the direction of rotation may cause the vehicle to ride harshly and vibrate.

Caution: When removing studded or radial tires from a vehicle, it is necessary to mark the direction of rotation on them so as not to change it when reinstalling.