Winnebago Industries Inc. has started shipping to dealers the first Class A motorhomes built on the Workhorse W20 chassis, according to Workhorse Custom Chassis LLC.

Thirty-five- and 37-foot models of both the Winnebago Adventurer and Itasca Suncruiser are now available on the W20 chassis as an option, according to Workhorse.

The W20 has a 20,700-pound gross vehicle weight rating (gvwr) and it has many of the features found on the Workhorse W22 chassis, which has a 22,000-pound gvwr.

The W20 also was “designed for easy integration with popular gasoline (engine) motorhomes currently built on chassis between 18,000 pounds and 20,700 pounds (gvwr),” according to the company.

The W20 and W22 both feature the General Motors new Vortec 8100 engine and an Allison 1000 Series 5-speed electronic automatic transmission.

Workhorse built 66% of all gas engine Class A motorhome chassis under 19,500 pounds gvwr as of last December, according to R.L. Polk data.