Firestone (217) 9016 Ride-Rite Gauge Set.

90-120 Pressure Switch. Firestone manufactures and provides air springs for all vehicles. We began developing air suspension for passenger cars and trucks more than 70 years ago. We continue to be innovative in product design, material selection and customer service so we can provide you with a better ride and safe load-carrying capabilities. Firestone stands for quality, reliability and service.