Prime center lock disc brake rotorthis superb disc brake rotor is specifically designed for mtb use as it offers optimal stopping performance and heat dissipation in wet and dry conditions. Ready for fast and rebellious downhill runs, this rock solid component features a japanese sus 410 stainless steel braking band construction. This makes it more than capable of handling all the rowdiness that comes with diving into corners and blasting across the woodland with power and poise.heat resistant mtb rotorengineered for top tier braking modulation and efficiency, this fantastic component manages heat build up during extended periods of braking. This allows you to enjoy an improved stopping experience while maintaining your momentum on tricky trail sections. One final highlight is this sleek version can be paired with any of prime's disc brake pads with race compound for maximum performance and a reduced brake squeal. Ideal for improving performance on any center lock wheelset.please note prime lock rings not included but are sold separately.features braking band material sus 410 stainless steel spider material 7075 alloy use mtbthickness 1.8 1.85mmedge chamfereddesign unique braking band pattern designbuy prime components from chain reaction cycles, the world's largest online bike store.