Cema 12V Jockey Wheels Dura-Ace black red (OS 12-14T)

CEMA 12s Dura-Ace R9200 Full Ceramic Jockey Wheel SetCategory: Spare PartsSubcategory: TransmissionUnlock the pinnacle of drivetrain performance with the CEMA 12s Dura-Ace Full Ceramic Jockey Wheel Set, the ultimate upgrade for cyclists demanding maximum efficiency and precision. Engineered specifically for Shimano´s flagship Dura-Ace 12-speed R920... more0 series, this pulley set replaces your stock components with a system designed to minimize friction and deliver tangible gains in speed and smoothness. Elevate your top-tier groupset and experience a new level of performance where every watt of power is transferred directly to the road.The core of this elite upgrade lies in its state-of-the-art full ceramic bearings. Unlike hybrid bearings, these feature both ceramic balls and ceramic races, creating an incredibly smooth, hard, and round surface that dramatically reduces rotational friction. This translates into significant watt savings, allowing you to maintain higher speeds with less effort or conserve vital energy on long rides. Furthermore, the full ceramic construction is impervious to corrosion and requires minimal lubrication, ensuring consistent, high-level performance and exceptional longevity in all weather conditions.Experience shifting that is faster, crisper, and more reliable than ever before. The CEMA jockey wheels are precision-machined from a solid block of 7075 T6 aluminum, an aerospace-grade alloy renowned for its exceptional strength-to-weight ratio. This meticulous CNC manufacturing process ensures perfect tooth profiles for flawless chain engagement and tight tolerances that eliminate play, resulting in immediate and decisive gear changes. The oversized pulley design, featuring a 12-tooth upper and 14-tooth lower wheel, reduces chain articulation and further decreases drivetrain friction, contributing to a silent, silky-smooth ride.Designed as a direct-fit replacement, installation is straightforward for any cyclist looking to enhance their Shimano Dura-Ace R9200 rear derailleur. If you are seeking to gain a competitive edge, achieve a new personal best, or simply enjoy the most efficient and refined drivetrain possible, the CEMA Full Ceramic Jockey Wheel Set is the definitive choice.Jockey wheels - Technical Specifications:* Product: Cema 12V (OS 12-14T) Dura-Ace Aluminum-Black-Full Ceramic pulleys.* Application: Pulley set for Dura-Ace 12-speed R9200 derailleurs.* Body Construction: CNC machined 7075 T6 aluminum body, providing superior durability, light weight, and precise chain tracking.* Pulley Sizing: Oversized System with 12-tooth (upper guide pulley) and 14-tooth (lower tension pulley).* Compatibility: Exclusively compatible with Shimano Dura-Ace 12-speed R9200 series rear derailleurs