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05

2022

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05

Off-road vehicle rim modification matters needing attention

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For an off-road vehicle, if you want to use low cost to improve the passing capacity, then choose to replace the tire rim is definitely a wise choice.
Since we have made a detailed interpretation of the tire modification part in the previous article, today we will talk about the matters needing attention in the modification of off-road vehicle rims.
First of all, we must clarify a question: why modify the rim?
One: lightweight
As we all know, the original rims of most off-road vehicles are subject to cost. Although the overall strength is good, the weight is really not flattering.
As one of the key indicators that affect the dynamic response capability of the vehicle, the unsprung mass is naturally the lighter the better. Therefore, one of the benefits of modified rims is to meet the strength requirements while still being able to obtain sufficient lightweight performance.
Two: the overall strength
However, this is not absolute. In the eyes of some real enthusiasts, the quality of the unsprung has never been their consideration. They can accept higher weight in exchange for more extreme strength and functional performance, even if it costs more.
Three: differentiated demand
Original rims are made entirely to meet low standards, and as long as you are clear about your needs, it is necessary to replace them.
For example, if you want better body stability, you need to change the negative value of the rim, and if you want to install a larger width tire, you need the rim to have a sufficient J value.
At the same time, the needs of desert players, rock climbing players and crossing players are also different, and there will be differences in the selection of products.
After clarifying the purpose of the modification, we have the second question: how to choose?
Of course, this step is also based on what tires you have already chosen to use, and then select the corresponding rim according to the size of the tire. Here mainly involves the following data:
Diameter: The diameter of the rim is in inches, as long as it is the same as the tire diameter when selected. However, based on the current tire market, it is more appropriate to choose a 17-inch rim.
Width: The rim width is the J value, which mainly refers to the distance between the flanges on both sides of the rim. If the J value is too large but the tire size is too small, it is likely to cause the vehicle to come off when driving at low tire pressure. And the fragile tire wall will also be directly exposed, so that the risk of puncture surge.
Offset: This concept comes from the German EinpressTiefe (ET), the literal translation is "depth of penetration". Specifically, it refers to the deviation between the section of the rim installation and the centerline of the rim, in mm, which is divided into three values: positive, zero, and negative.
Special attention should be paid to this part of the data when selecting the corresponding product. The ET value determines whether the rim interferes with vehicle parts. If the negative value is too large, it may not only cause friction between the tire and the car body, but also increase the burden on the axle shaft and the steering gear due to the excessive torque lever.
Hole distance: The rim hole distance is also called "PCD", the unit is mm, which refers to the diameter between the fixing bolts in the center of the hub. For example, 5X112 means that the PCD of this hub is 112mm and the holes are 5 bolts.
Center hole: The center hole is the part used to be fixedly connected to the vehicle, that is, the position of the hub center and the concentric circle of the hub. The diameter size here will directly affect whether the rim can be installed normally.
Most of the above data can be selected directly with reference to the original wheel hub, but the ET value and J value need to be reasonably matched according to their own needs.
We suggest that you can choose a combination of wide tires and slightly smaller J values, such as 265/70/R17 tires with 7.5J rims. As for ET value, it depends on your personal needs and whether it has increased.
After determining the various data, you can begin to choose your favorite style.
However, there is another question here: Do you need an anti-riring hub?
If not, then the following content has nothing to do with you.
But if you need it, you have to choose between internal and external protection.
Here, I want to tell you the role of the anti-rims. When the off-road vehicle needs to drive with low tire pressure for a long time (such as rock climbing, desert, etc.), the ordinary rim cannot tightly fix the tire wall, and it is likely that the tire will break away. The situation of the rim leads to danger.

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Matters needing attention in purchasing modified wheels

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Matters needing attention in purchasing modified wheels

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