About JWHEEL When modifying the wheels of a car, these 4 data should not be ignored user manual | JWHEEL

Many car owners will buy wheels to modify their cars when they get a new car or after driving for a while. However, buying wheels is not a simple matter, choose the right data in order to make the modification in one step.

March 07, 2023
About JWHEEL When modifying the wheels of a car, these 4 data should not be ignored user manual | JWHEEL

When modifying the wheels of a car, these 4 data should not be ignored if you want to get it right

In modern car modification, wheel modification is a very popular modification direction, because modifying the wheels can enhance the car's face and win a higher rate of return, and can also improve the car's safety and handling performance.


Many car owners will buy wheels to modify their cars when they get a new car or after driving for a while. However, buying wheels is not a simple matter, choose the right data in order to make the modification in one step.


1. Size of the wheel.

The size of the wheel is actually the diameter of the wheel, people often say 15-inch wheels, 16-inch wheels, of which 15, 16 inches refers to the diameter of the wheel.

Generally speaking, a larger wheel size and a higher tyre flat ratio will give the car's wheels a good visual tension and better handling stability.

However, the size of the wheel is not the bigger the better. The size of the wheel must match the size of the tyres, which are too large for the tyres to fit, and even if they do, the tyres tend to be too flat and too thin, resulting in a significant reduction in the car's shock absorption and comfort.

The correct approach is to look up the diameter parameters of the wheels when shopping for them, either through the Owner's Manual or through the parameters marked on the tyres.


2. Width of the wheel.

The width of the wheel, also known as the wheel J-value, has a direct impact on the flatness of the tyre. Tyres of the same size with different wheel J-values will have different flatness and width.

If the wheel J-value is not chosen correctly, it will either lead to over-flattened tyres with reduced thickness and greatly reduced shock absorption, or to tyres that are too high and have an impact on components such as brakes.

Therefore, when choosing the width of the wheel, it is best to also refer to the corresponding data for purchase.

3. Hole spacing and hole position of the wheel.

The wheel's hole pitch is the PCD, i.e. the pitch circle diameter of the wheel, which refers to the diameter between the fixing bolts in the centre of the wheel, while the hole position refers to the number of bolts on the wheel; they are usually expressed as 4x114.3, 5x114.3, etc.


In the case of 5x114.3, for example, the 5 represents the number of bolts in the hole position, while 114.3 represents the PCD of the wheel. This figure directly determines whether the wheel can be mounted on the car, so the choice is very important.

For safety and stability reasons, it is best to choose a wheel with the same PCD as the original when selecting the wheel's hole spacing.


4. Wheel offset.

The offset of the wheel, also known as the ET value, is the difference between the middle screw mount of the wheel and the centre point of the entire wheel rim.

The ET value not only affects the visual effect of the wheel, but also the steering characteristics of the car, the wheel alignment angle, etc. For example, an excessive ET value may lead to tyre bearings that are prone to wear, or even not fit properly at all.

Most of the time, the same brand of wheel will offer different ET values. The safest scenario is to keep the ET value of the modified wheel the same as the original ET value without modifying the brake system.


  Well, the above is the data that you need to pay attention to when buying a wheel to modify your car, do you understand it all?

  Jwheel, as an professional wheel manufacturer, concentrates in R&D and manufacturing of aluminum alloy wheels, including casting wheels, forging wheels and flow-form wheels. The products of it have passed the certifications of SEI、SEMA,VIA, JWL, JWL-T, TUV and so on. Since establishment, Jwheel has been developing steadily, with rich experience of designing and producing aluminum alloy wheels. It has earned the appreciation of both domestic market and foreign market with its high technology, good quality and customer service. It provided OEM service to many international brands like Vossen, OE Wheel, TSW, Rays, ProLine, Oxygen, AUTEC, etc., and it also provide ODM service, that is, for producing a new wheel, you can just provide a sketch, drawing or picture, and then Jwheel will finish the rest parts. By the way, the MOQ of forging wheels is four. (For more information, just go to the website:



Heavy tasks are now done with the help of this product. It produces more work with little energy and also within a limited time.


1.Q: Where’s your factory ?
A: My company is in Jiangmen City, just need 1 hour from GuangZhou BaiyunStation to our factory.
2.Q: Are you trading company or factory
A: We are a factory with over 20 years of manufacturing experience.
3.Q: What kinds of method do you use to put customized logo?
A: Silk screen printing. Laser engraving. Stamping.


1.The company has obtained a number of patents by virtue of its strong technical strength: Patent for a clean grinding table based on aluminum alloy wheels.
2.We not only have the traditional low-pressure casting technology, but also have the high strength and light weight manufacturing technology of "low-pressure casting + spinning". We always maintain various advanced technology advantages in aluminum alloy wheel manufacturing to meet customers' needs and lead the industry development.
3.The company is located in Guangdong, Hong Kong and Macao Bay Area, an important node city of Jiangmen. With modern production facilities, we adopt the industry's advanced casting, machining, painting and inspection equipment, equipped with automatic robots throughout the process, and with ERP system and other advanced management means, to create the industry benchmark for hardware, software and product quality.
4.The company has been focusing on quality, management and environmental protection, and has passed. ISO 9001:2015, IATF 16949, Germany KBA, Japan VIA association certification (laboratory certification).


Guangdong Guangchuan Auto Parts Trading  has its first plant established in 1993. After over 29 years’ development, Guangchuan Auto Parts Trading has become a world-leading supplier for many international famous wheel brands. Guangchuan Auto Parts Trading has an annual production capacity of 1.5 million and it provides one-stop solution for design and manufacturing. It’s equipped with advanced production facilities such as aluminum alloy melting furnace, casting production line, spinning and forging equipment, automatic painting line, helium leak detection system and automatic dynamic balance inspection system.

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