RFX Pro Floating Front Disc (Black) Yamaha YZF250/450 16-21 RFX Race Series Discs are designed and tested at the highest level by top World and British championship race teams.  Precision laser cut from high grade stainless steel and heat treated for wear resistance, RFX Discs also feature a special comaxit heat proof coloured finish on non-wear faces for the best corrosion resistance. RFX Race Series Discs are surface ground to within 0.01mm for instant brake feel and reduced fade. RFX Race Series Discs are the new price leader in OEM replacement brake discs. Race Series Disc Features: Laser cut from high grade quality stainless steel. Heat treated to withstand excessive brake pad wear. Comaxit coating (metal colour surface treatment). CAD designed profile for lightness and reduced unsprung weight. Wave design ensures maximum pad cleaning. Precision cut vented holes and wave design dissipate heat.