These American made sprockets are machined of aerospace grade alloys, anodized and are some of the same units we use on our Superbike Unlimited YZF-R1 & ZX-10RR race bikes. Each sprocket is engineered to achieve maximum lightness and strength. 

These sprockets feature a 5 bolt aftermarket bolt pattern, commonly used on wheels by OZ, Marchesini, BST, CoreMoto (Apex-6 only), Rotobox and other manufacturers. They will not fit most OEM wheels. 
 

Bolt hole count: 5
Sprocket stud size: M10
Bolt Hole Circle diameter: 100mm
Hub Diameter: 76mm