About 4 years ago I purchased a Nirve Beach Cruiser 7 and made it more off road capable. Knobby tires, MTB handlebars, MTB seat, better gearing for offroad with a 3 piece crankset conversion set and swapped the rims from an older MTB (cassette). More useful gearing on the rear sprocket, as the stock Shimano "MegaRange" freewheel has about a 10 tooth difference on the lowest gears which can get quite annoying offroad or on any hills for that matter.
