Shimano Tiagra RD-4500 GS Rear Derailleur (Long Cage)
Shimano's Tiagra Rear Derailleur provides precise gear changes. Everything you need in a derailleur is here: smooth 11-tooth pulleys, a light-action spring and a wide outer-pivot design that increases rigidity for precision shifts every time.
Chain-wrap capacity: up to 37 teeth. Click for an explanation of chain-wrap capacity.
Largest cog this derailleur can handle: 27 tooth
The Shimano Tiagra Rear Derailleur is compatible with 7, 8, and 9 speed cassettes.
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