We stock a large selection of new and used G.I. tires. Reasonably priced for all applications. We also stock a variety of rims and wheel parts for conversions or replacement. Specially, fabricated heavy-gauge wheels are also available for custom conversions. Describe your wheel or rim requirements. Chances are, we’ll have just what you need. Considerations for selecting the best gear ratio: An F550 with 4.88:1 axle ratio on Single Wheel Conversion 41″ tires has an equivalent ratio of 3.94:1. A Brush Truck or Camper will weigh 19,500lbs at maximum load – half the GCWR of a fully laden F550 and 6,000lbs less than an F250 with 3.31:1 gears.