New! 2017 Nelson CBC-20ST Boom Dolly, Call for Details. 9' 2" Overall Length 8' 6" Overall Width 54.5" Trailer Axle Spacing GVWR 40,000 Lbs DISCLAIMER: Price quoted is Ex Works and does not include any freight or delivery charges. Specifications are believed to be correct but may contain errors and/or omissions. Pictures are representative and may not be identical. Description and Images Custom Truck One Source.