For racers and experienced tuners, the 3RACING 3RAC-WF305/BK M3 flat washer 0.5mm offers consistent shim height for predictable setup adjustments. These washers provide repeatable spacing that helps preserve alignment when refining handling and drivetrain geometry.
Manufactured from aluminium, these washers combine low mass with stable thickness. Use them where tight tolerances matter and check seating and torque to avoid compressive deformation in softer interfaces.
Typical uses include fine shimming of suspension pivot points, motor mount spacing, and correcting minor steering linkage offsets. Stack in measured increments to document setup changes and return to baseline quickly during testing.