Goodyear Optitrac R-1W 620/70 R42 166D Goodyear Optitrac R-1W 620/70 R42 166D Goodyear Optitrac R-1W620/70 R42 166D Vehicle type: Special Usage: Farm Manufacturer: Goodyear Width: 620 Height: 70 Construction: R Diameter: 42 Load index: 166 Speed index: D Highest Price: