Rear derailleur SunRace RDM57, 7/8-speed, long cage

SunRace makes bicycle components for mountain (MTB), road, electric, city and children’s bikes. Its range includes shifters, derailleurs, cassettes, cranksets, chains and other components. The company was founded in Taiwan in 1972.

Technical specifications

• Cage length: long
• Suitable for 7- and 8-speed systems
• Compatible with SHIMANO/SRAM
• Maximum number of teeth on the largest sprocket: 34T
• Minimum number of teeth on the smallest sprocket: 11T
• Maximum tooth difference between the largest and middle chainrings: 20T
• Maximum capacity (largest front chainring - smallest front chainring) + (largest rear sprocket - smallest rear sprocket): 43T
• Outer / inner link: steel
• Bracket / plate body: engineering polymers
• Outer / inner cage section: steel
• Guide pulley: 11T (bushing)
• Tension pulley: 13T (bushing)
• Bracket bolt: steel
• Cable adjuster: composite
• Weight: 376 g