Absolute Black, a company renowned for its innovative cycling components, has recently unveiled its latest advancements in disc brake rotor technology: the Raven SL and Raven GT. These new rotors address a critical issue that has long plagued cyclists: the impact of material removal on braking performance.<\/p>\n
The Challenge of Material Removal<\/strong><\/p>\n Since introducing its first Center Lock disc rotor, the Raven, in 2012, Absolute Black has been at the forefront of lightweight rotor design. The 95g Raven rotor garnered attention for its exceptionally low weight, prompting the company to explore how much material could be removed without compromising braking performance. Over a decade of research, including testing with their Graphen brake pads, revealed that uneven material distribution across a rotor’s friction surface leads to localized overheating and uneven wear. This phenomenon can significantly degrade braking performance, especially under high temperatures.<\/p>\n Innovative Design Solutions<\/strong><\/p>\n To address these challenges, Absolute Black developed a dedicated software to analyze and optimize the distribution of material across the rotor’s friction track. The goal was to ensure that every circumferential path across the braking surface maintained a consistent amount of steel, thereby promoting even heat dissipation and reducing the risk of thermal overload. This meticulous design process resulted in the Raven SL and Raven GT rotors, each tailored to specific rider needs.<\/p>\n Raven SL: Lightweight Performance<\/strong><\/p>\n The Raven SL rotor is engineered for riders who prioritize weight savings without sacrificing performance. Featuring a two-piece full-floating construction, it allows the stainless-steel friction ring to expand independently of the carrier, reducing distortion during temperature fluctuations. Independent testing by EFBE Pr\u00fcftechnik GmbH demonstrated that the Raven SL rotor dissipated 92.7Wh of braking energy, closely matching the 92.9Wh dissipated by a Shimano Dura-Ace rotor. This indicates that the Raven SL rotor offers comparable thermal management to established competitors. Additionally, after bedding in, the Raven SL with Graphen pads generated 241Nm of brake torque with 140N of lever force, surpassing the 211Nm generated by the Shimano Dura-Ace combination under the same lever force. (bikeradar.com<\/a>)<\/p>\n Raven GT: Enhanced Thermal Capacity<\/strong><\/p>\n For riders demanding superior thermal performance, the Raven GT rotor incorporates over 500 smaller perforations and additional material to enhance heat dissipation under sustained braking. This design ensures consistent braking performance during prolonged descents or aggressive riding. The Raven GT rotor also features a two-piece full-floating construction, similar to the Raven SL, to accommodate thermal expansion and minimize distortion. Independent testing by EFBE Pr\u00fcftechnik GmbH confirmed the Raven GT’s exceptional heat resistance and braking torque, validating its design and performance. (bikeradar.com<\/a>)<\/p>\n Conclusion<\/strong><\/p>\n Absolute Black’s Raven SL and Raven GT rotors represent a significant advancement in disc brake technology. By addressing the critical issue of material distribution and thermal management, these rotors offer cyclists enhanced braking performance tailored to their specific riding needs. Whether seeking lightweight efficiency or robust thermal capacity, the Raven series provides a solution that combines innovation with practical performance benefits. <\/p>\n