Create Idea Silver Pair 11T Mtb Rs Bearing Pulley Wheel Bicycle Cycling Rear Derailleur Speed

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Fits For Most Bike Aluminium Jockey Wheel Rear Derailleur Pulley 11T 8/9/10 Speed. Note: Please confirm the detailed dimension before ordering, as this item cannot fit for all kinds of 11T bikes. The aperture of the center hole(with silver cap): 5mm diameter Thickness: 10mm Diameter: 43mm