Founded in Massillon in 1971 with a single roadwheel machine, Standards Testing Laboratories (STL) has grown into an independent laboratory that tests tires, wheels, and related automotive components while also designing and manufacturing testing equipment. Its three-division, 10-acre complex operates more than 100 test positions around the clock, and the company says it is the world’s largest independent dynamic testing facility for this field. STL remains family-owned and operated and holds ISO 17025:2017 and ISO 9001:2015 accreditations for many evaluations.
ISO 17025:2017
certification
ISO 9001:2015
certification