About Bob Mertens Truck & Trailer Sales We carry a good selection of clean used equipment. Call today and let us help you find what you need! Bob Mertens Truck & Trailer sells Peterbilt, Kenworth, and Freightliner heavy-duty trucks. We specialize in Pre-Emission Trucks with no EGR or DPF systems. Our trucks save you thousands in maintenance and keep you on the road longer! We also sell grain hoppers, flatbeds, curtain side trailers, and many other trailers to keep you going! Bob Mertens Truck & Trailer has been in business over 20 years, our used truck and trailer dealership has been serving Wisconsin truckers and farmers, along with truckers nationwide. We find the perfect trucks for farmers and truckers throughout Iowa, Nebraska, Minnesota, Wisconsin, Illinois, Indiana, Kansas, and the Dakotas. Most of our long and tall trucks come with over overhauls, new rubber, new or reman transmissions, Cat engines, and occasionally highly sought after 6NZ engine!! Our trucks are professionally detailed before hitting the lot.