Upgrade your 105 R7000 series 11-speed rear derailleur with the 105 RD-5800-GS 11-Speed Rear Derailleur Pulley Set - the ultimate component for enhanced drivetrain performance and smooth shifting. Crafted with precision engineering and materials, these pulley assemblies ensure your bike maintains optimal chain control across all gear ranges, especially in challenging terrain or high-speed conditions. Materials & Construction: Constructed from durable, lightweight materials, the 105 RD-5800-GS pulley set features robust metal pulleys with precision-machined teeth designed to withstand the rigors of every ride. The upper pulley's larger teeth increase chain guidance and reduce friction, culminating in smoother gear transitions and improved drivetrain efficiency. Performance & Engineering: Designed specifically for 11-speed drivetrains, these pulley assemblies optimize chain tension and reduce power loss, translating to more responsive shifting and improved overall bike performance. The larger teeth on the upper pulley provide better chain retention and control, especially beneficial during aggressive riding or rapid gear changes. Components & Technology: The 105 RD-5800-GS pulleys utilize 's advanced engineering to enhance durability and reduce wear. The optimized tooth profile minimizes chain noise and contributes to a quieter, more refined riding experience. These pulleys are fully compatible with 105 R7000 series derailleurs, making them a perfect upgrade or replacement part. Style & Use Case: Designed for road cyclists seeking reliable and high-performance drivetrain components, these pulley sets are ideal for endurance riding, racing, or everyday cycling. Their sleek design complements the 105 groupset, maintaining your bike's professional aesthetic while delivering top-tier shifting performance. Innovative & Differentiating Features: The key feature of this pulley set is the larger teet

Gustavo Mondragon (comprador verificado) –
Give your deraileur a second life!
I decided to give a second life to my Shimano Acera and they work great! Easy to install, easy to maintain, good quality to give a second life to your deraileur instead of buying a new one. Fully recommended!
Stevee56 (comprador verificado) –
Big difference in shifting
Arrived promptly, easy to fit (lots of on line videos), and have made a difference to shifting and chain tension