STL tests dragster wheels
Standards Testing Laboratories, Inc. (STL), has been recognized as the testing source to test drag race wheels to meet SFI Foundation, Inc. (SFI) specifications. SFI is a non-profit organization established to issue and administer standards for specialty/performance automotive and racing equipment. The organization has a formal relationship with more than 200 race sanctioning bodies, providing an SFI standard compliance label for use on race-related products.