• Firestone Firehawk Wide Oval Indy 500

    Firestone Firehawk Wide Oval Indy 500
    275/40R18 99W
    Summer/Highway Terrain

    BSW

    320/A/A

    Part number: 0055011910345400940

    Sizes
275
Section width 		40
Aspect ratio 		R
Construction 		18
Rim diameter 		99
Load index 		W
Speed Rating 		SL
Load range 		TL
TL/TT
Specs Code/Value Description
Section width Section width
 275 (mm) 		The distance between the outside of a tire sidewalls, not including any lettering or designs.
Aspect ratio Aspect ratio
 40 (percentage) 		The aspect ratio determines the height of the sidewall and is a percentage of the section width.
Construction Construction
 R (Radial) 		Radial construction tire.
Rim diameter Rim diameter
 18 (inch) 		Diameter of rim seat supporting the tire bead.
Load index Load index
 99 (775kg/1710lbs) 		Maximum load each tire is designed to carry when inflated to the recommended pressure.
Speed Rating Speed Rating
 W (270km/h/168mph) 		Maximum speed at which a tire can roll with the load indicated in its load index.
Load range Load range
 SL (4 ply) 		Maximum load capacity the tire is engineered to handle at certain inflation pressures. It also define the tire toughness and the strength of the sidewall.
TL/TT TL/TT
 TL (Tubeless) 		Tire specifically designed for fitting to appropriate wheel rims without an inner tube.
Manufacturer part number Manufacturer part number
 137386 		Alpha-numeric designation assigned by a manufacturer to uniquely identify a tire product.