Replacing aftermarket wheels has become mandatory for car modification enthusiasts. Usually, the diameter of the wheel is replaced with a larger size. For example, the default wheels are ring size 16 and will be changed to ring size 18 or even 20.
Well, this wheel replacement will certainly be followed by a tire replacement to a larger diameter too. But remember, for convenience, replacement of wheels and tires also has conditions, not just replace it just like that. Pay attention to some of the rules of the game to replace the correct car wheels.
- Pay attention to the outer diameter of the tires to be used
The most important thing is to pay attention to the outside diameter (od) or outside diameter of the tire that will be used when changing the wheel to a larger diameter. As much as possible, the outer diameter of the tires must remain the same even though the wheel size is changed to be bigger. In conclusion, when changing the wheels, you must also pay attention to the size of the tires that will be used as well.
- Pay Attention To The Aspect Ratio Of The Tire
The most important thing is to pay attention to the aspect ratio of the tires, or the thickness of the tires. The aspect ratio is calculated as the percentage of the section width (the measure between the sides of the tire, measured from the inside of the tire) compared to the section height (the height from the tread to the bead of the tire or the base of the tire holding the wheels).
For example, at the following size, 225 / 35R19. “225” is the section width, while the aspect ratio is “35”. The smaller the aspect ratio, the more typhoid the tires will be and vice versa, the bigger the number, the thicker the tires will be.
- Pay attention to the risks of changing wheel size
If you replace a wheel with a diameter that is too large, you will end up using a tire with a small aspect ratio. Of course this is directly related to the comfort of the car later.
The thinner the tire, of course, has a very small deflection, so its ability to help absorb vibrations is somewhat reduced. The effect is not only reduced comfort but also shortens the lifespan of the legs as well.
The diameter is bigger, the automatic rotating load of the steering system will be heavier too. The steering gear will wear out quickly. Even the tie-rod ends, ball-joints and wheel bearings will be short-lived.
- Pay attention to the width of the wheels
The replacement of the wheels had a number of impacts on the car. The first thing to remember is, the bigger the wheel size, the bigger the wheel width. For example, 15-inch alloy wheels are between 6-7 wide. Well, 17-inch wheels usually have a width that can reach 7.5 – 8 inches.
The wider the wheel size, the greater the tire grip area. This will cause increased body roll and understeer symptoms from the car.
Body roll is the movement of the vehicle body towards the outer corner. While understeer is a symptom that the car tends to be straight even though the steering wheel has been deflected.
- Ideally Up 2 Inches From Standard Size
Therefore, for ideal comfort, the wheels are only 2 inches higher than the standard. With the replacement of wheels that are not too big, besides being able to use tires with an aspect ratio that meets comfort standards, there is also no need to bother recalibrating the speedometer.
- Pay attention to changes in the fulcrum of the car
When a car uses larger and wider wheels, it will cause the center of gravity or fulcrum on the wheel to shift. In addition, changes in the wheel fulcrum can also be affected by the use of wheels with different offsets from the standard.
The wheel offset indicates how much the center surface of the wheel protrudes in or out. The smaller the number, the more the middle section of the wheel and the rim of the wide rim.
- Pay attention to the ability of car EPS
Large wheels and wide tire treads can also shorten the life of Electronic Power Steering (EPS). So, adjust the EPS capabilities. Especially if the EPS model is small. Try not to be overloaded.
In addition, the maximum increase is two inches – as described above, you can also use the plus one or plus two strategy, which is to increase the size one step or two steps larger than the manufacturer’s standard.
For example tire size 185/60/15. 185 indicates the code tire width, 60 tire height, and 15 rim diameter. So if you go up one step you can use the size 205/60/16. Whereas for two steps, you can use the size 205/60/17.
In conclusion, you still have to pay attention to the ideal size of the wheels you need for your own car. Everything depends on the budget of each of your pockets, if you have thin pockets you can buy or use KW wheels, but there is definitely a risk that you have to accept if you use KW wheels, your wheels can break when your car is driving at very high speeds.
But there are other options besides buying KW wheels, namely buying used wheels, now to save you can also buy used wheels, now this option is the safest option if you have thin pockets.
Happy hunting for wheels, guys!