Jost fifth wheel now standard on Pete 579s


Peterbilt has made the Jost JSK37 inboard air slide fifth wheel standard equipment on its Model 579 Class 8 truck, Jost says. The base of the new slider is 23 lbs. lighter than previous models, allowing for increased payloads and higher profitability. The standardization is effective this year.

“In addition to the weight savings Peterbilt customers will realize,” noted George Smith, senior account manager for Jost International, other benefits “include ease of use, infinite adjustment possibilities, and reliability.”

Jost’s fifth wheels have only four moving parts. The positive coupling design ensures a true connection, the company says. Upon contact, the spring-loaded steel locking bar automatically slides into position, securing the kingpin. Jost offers a five-year warranty on all of its durable cast ductile iron top plates.