For European vehicles, such as wagen, BMW, and Benz, you must prepare new wheel bolts when the make, size, and spacer thickness of the wheel you use to secure the wheels.
When purchasing bolts for spacers, please check the current bolt shape and choose the length of the spacer is longer than the thickness of the spacer.
When using new external wheels, make sure to check the tapered angle of the bolt hole on the wheel.
The material boasts enough hardness
Uses 40Cr material equivalent to JIS standard material SCr440.
40Cr is a GB standard for Chinese national standards (equivalent to Japanese JIS).
JIS G 4053 is the same as SCr440, which belongs to the "Alloy Steel Material for Mechanical Structure" (the highest carbon content of 0.38 to 0.43 and the second highest among chrome steel), making it suitable for forging, cutting, tempering, tempering, tempering, and carbon inersion.