Used Keenan feeder chassis. Various available, 8- 19t max load. Plenty of uses for these – flatbeds, muck trailers, timber trailer, processing trailer. See a water bowser we made for a customer. 5m rails and 2.4m wide. The chassis rails are offset, but the drawbars are central to the axle. So if you fabricate a subframe over the top, it becomes irrelevant. Come with super single wheels and tyres. More info or pricing for bespoke fabrications – 07976526349. Can deliver at cost.