Factory Spec, FS-211, 2x1-3/4" ATV Wheel Spacers - 3.5" Total Spacing - 4/137 Bolt Pattern 10mm Studs Manufactured by Factory Spec (1) Pair of 1-3/4" spacers - adds 3.5" total width, makes it easy to widen the stance of your ATV. Provides extra stability and has the ability to accommodate larger tires. 6061 T-6 aluminum for maximum durability Get that extra stability you need