The lightweight CFR-09FS is made from stainless steel but is almost as light as rotors with aluminium carriers, However it has the added benefit of better durability.. Features:. • 420CR full stainless steel construction. • Invulnerable to warp. • High quality paint finish. • Bike Compatibility: MTB, Road, Hybrid. • Diameter: 160mm. Colours Available: Black or White.