For European vehicles such as Wagen, BMW, and Benz, you must prepare new wheel bolts if the wheel manufacturer or size of the wheel used to change the thickness of the spacer, etc.
When purchasing bolts with spacers, please check the bolt shape you are currently using and choose a size that has a longer neck than the thickness of the spacer.
When using new external wheels, please be sure to check the tapered angle of the bolt hole on the wheel.
Material boasts sufficient hardness.
Uses 40 Cr material similar to JIS standard SCr440.
40Cr is a standard material for the Chinese national standard (equivalent to Japanese JIS).
Since the SCr440 belongs to JIS G 4053 "Machine-Structured Alloy Steel" (Carbon Content of 0.38 to 0.43 and the second highest in Chrome Steel), it is suitable for forging, cutting, hardening, tempering, and hardening, charcoal hardening.