ROAD KING HEAVY DUTY 20" DOUBLE TENDER SPRING KIT WITH 3 HOSE HOLDER RK-20020T. Founded in 2014, Fasttech is a global sourcing and manufacturing group that is dedicated to delivering high quality products and services. We have developed the exclusive Road King Truck Parts brand as a premium after market truck & trailer product line. At Fasttech we know what life on the road is like, therefore our goal is to support YOU, the drivers and fleet owners with excellent aftermarket replacement parts at unprecidented low prices. YOU move North America and without YOU we all go nowhere! Let our team of experts help you with your truck trailer accessory needs.