[willi]

kurt pvc inside diameter of 12 inches displaces 49 pounds for each foot of length - 18 inch dia. displaces 109 pounds for each foot . do not place flotation under the vehicle as one sugestion--more unstable and reduces clearance. do not dual the tires , it will give a little more flotation be very difficult to steer and hard on axles, bearings and add weight when in marsh will tend to help bog down. YOUR BEST OPTION IS A LIGHT WEIGHT TRACK AND FLOATS ON THE SIDES this is from experience - not a guess. i have built several marsh vehicles and worked with many -BILL