CeramicSpeed OSPW RS – Argent Special Edition | For Shimano Dura-Ace & Ultegra Di2 (R9250/R8150)

DescriptionCeramicSpeed OSPW RS – Argent Special Edition | For Shimano Dura-Ace & Ultegra Di2 (R9250/R8150)OSPW RS – Shifting RedefinedSince introducing the Oversized Pulley Wheel (OSPW) system in 2015, CeramicSpeed has set the benchmark for drivetrain efficiency. With the new Racing Sport (RS) line, the Danish brand takes performance and durability to the next level – blending sleek design, innovative features, and refined engineering for the ultimate riding experience.The Argent Special Edition brings a striking silver finish and a clean aesthetic, with a distinct new cage graphic for those who want both performance and exclusivity.Key FeaturesPulley Wheels: 13T upper / 19T lower – aluminum with composite Narrow/Wide teeth (Alpha Disc design)Bearings: Handmade hybrid – ceramic balls with stainless steel racesCage: Carbon fiber reinforced polyamide (injection molded)Spring Tension: 4 adjustable levels for tailored setupWeight: ~102 g (manufacturer’s claim)Warranty: Lifetime (with ADR technology)Advanced TechnologyALPHA Disc – Solid aluminum disc with composite teeth for maximum rigidity, durability, and quieter shifting. Prevents debris from lodging in the pulley.Active Debris Remover (ADR) – Patent-pending dust cover system that seals the bearing completely to keep out dirt, mud, and grime. Tested in extreme off-road racing.Together, these innovations ensure long-term efficiency, reduced friction, and superior drivetrain protection.CompatibilityGroupset: Shimano Dura-Ace Di2 R9250 / Ultegra Di2 R8150 (12-speed)Max Cassette: 36T