What variants are the SRAM HS2 Rotors available in? HS2 is available in both 6-bolt and Center Lock mounting interfaces in the following sizes: 160mm, 180mm, 200mm, and 220mm. For more information, please visit our product page. Related articles Is the new SRAM HS2 Rotor compatible with my existing SRAM brake? What´s the advantage of the SRAM HS2 Rotors over previous models? Do I need a different brake pad compound for the SRAM HS2 Rotor? What can I do about overheating in my SRAM brakes? Are there specific SRAM brake rotors for road use?