Firestone Industrial Products Company, LLC R4Tech air suspension system was featured on the PowerBlock TV show "Trucks!" Sept. 10-11, 2011 on Spike TV.  

The episodes showcased a complete R4Tech system installation on a 2011 Ford F-250, demonstrated by "Trucks!" hosts Kevin Tetz and Ryan Shand.

Designed to replace the factory leaf spring suspension, Firestone's R4Tech system delivers an improved ride at all times by utilizing the variable spring rate of the air spring to stiffen when the truck is loaded and soften when unloaded. The R4Tech hybrid air/leaf suspension system features a Firestone Airide air spring, Ride-Rite air accessories and a SANLUIS Rassini leaf-spring suspension to create a fully functional system that adjusts for varying load capacities.  

Firestone and SANLUIS Rassini engineers have designed multiple applications to fit both 2WD and 4WD trucks as well as all cab and bed configurations. The complete R4Tech system comes with the Rassini foundation suspension - including leaf plates, lower trailing link, J-spring, spring perches and mounting brackets - the Airide air spring and an air compressor control system that maintains the proper air level in the spring for the exact load you're carrying. Professional installation is recommended for R4Tech systems, which use the same factory holes as the OEM leaf suspension.

Firestone offers a line of Complete Suspension Solutions for today's trucks that includes Ride-Rite, Sport-Rite, Coil-Rite, and Level-Rite air helper springs; Work-Rite load assist springs; and the R4Tech hybrid air/leaf suspension system. These products have become synonymous with quality, durability and outstanding customer support.  For more information, visit www.ride-rite.com.