Shimano Tiagra Rear Derailleur – GS. The Shimano Tiagra RD-4601-GS Rear Derailleur is designed for 2×10-speed and 3x 10-speed systems and features modern Shimano technology for fitness cyclists. Wide link design increases rigidity and service life, even under heavy loads. Advanced Light Action and low-friction link pivot bushings provide crisp, smooth and reliable shifting performance.
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