LOW-PROFILE TIRES FOR CAR
In this article we will talk about low profile tires, their main advantages and disadvantages. Should I switch to these tires, if there is a modified or ordinary car?
WHAT IT IS? If you ask a tuning enthusiast what distinguishes a “cool car” from a usual one, then low profile tires will be named among the first signs. Indeed, the wheels of the car with a large radius and a narrow strip of rubber look much more aggressive and more beautiful. But how does this affect the car itself, which should not only please the eye, but also go safely? As we know, the standard marking is: 235/45 R20. Let me remind you that the figure after R means the diameter of the disk on which the tire is installed (it is measured in inches), and the group 235/45 shows that the tire width is 235 millimeters and the ratio of the height of the profile to the width is 45%. Initially it was believed that if this ratio is less than 60%, then this rubber is low profile. Indeed, this is considered a tire with an indicator below 55%.
WHY EXCEPT BEAUTY NEEDED? Machines are becoming more powerful and faster. High speed requires high braking qualities. They are provided with two parameters: the size of the brake disc and the contact area of the tire with the road. Accordingly, in order to improve the brakes, it is necessary to increase the diameter of the brake disc, which is limited by the diameter of the wheel rim. And since it is impossible to increase the diameter of the rims infinitely, this increase has to be compensated by a decrease in the height of the profile. To increase the contact area of tires with the road, it is necessary to increase its width – this has a positive effect on the air volume in it (which has decreased due to the lower profile height). That is why the speed characteristics of low-profile tires are much higher than normal, their speed index only begins with “H” (210 km / h), and “V” (240 km / h) is considered standard and is not limited to this … With high speed and braking properties figured out, and thanks to the low profile, the car is significantly less swayed on bends, which, with better grip, provides higher controllability.
CONS For all the good you need to pay. And the chic speed characteristics of low-profile rubber turn into flaws. This is especially true for imperfect road surfaces. They are particularly visible difference in driving comfort, which is reflected in the suspension and chassis as a whole, and on the resource of the disk – to break through such a tire or split the disk when entering at speed in the pit – a common phenomenon.
Noise – the flip side of increasing the width of the tire, as a large area of contact with the road increases the noise; Great propensity for aquaplaning, from which it is more difficult to divert water; The increase in load on the power steering is associated with greater control stiffness; Increased attention to the level of pressure in the tires – it needs to be checked more often, since even a small loss of pressure threatens to trouble; Well, the price is not only that low-profile tires are more expensive than their high-profile counterparts, so you still have to change the wheels to wider and with a larger radius. Knowing the advantages and disadvantages of low-profile tires, evaluate them to the conditions of most trips, driving style – and decide whether to switch to them. It is also important that there are beautiful discs with them.