The Box Three Disc Brake Rotor is a Stainless Steel, 6 bolt rotor designed for BMX Race. Utilising a small size and rounded outside edges for safety is the optimal size for any BMX Race bike.
With safety in mind the perimeter has been rounded as well as having optimal cutouts to dissipate heat.
Specification: 
Material: Stainless Steel
Process: Stamped & Ground
Hardware: T-25 Rotor Bolts
Finish: Natural
Size: 120 mm or 140mm
Compatibility: ISO 6 Bolt Interface
Weight: 120mm - 78g/2.7oz
Weight: 140mm - 113g/4oz