Hope MTB Center Lock Disc Rotor For Demanding Applications When the descents start to get nasty, you'll want a brake system that will instill confidence so you can descend under control. The Hope MTB Center Lock Disc Rotor is Hope's high-performance option for demanding applications. It is constructed in two parts with an aluminum center and stainless steel braking surface. This allows the stainless steel outer to expand separately from the center and handle high temperatures without warping. The aluminum center acts as a heat sink to keep the disc temperatures lower. Features The aluminum center acts as a heat sink to keep the disc temperatures lower Stainless steel outer expands separately from the center to handle high temperatures without warping True floating design allows 1deg of freedom SPECIFICATIONSDiameter160mm, 180mm, 200mm, 203mm, 220mm Material Steel & Aluminum Intended Use XC, Trail, Gravity Weight146g (180) | Hope Technology | Mtb Centre Lock Disc Rotor Black 180Mm