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2-piston or 4-piston? Testing & comparing Shimano's brand new XTR disc brakes - Singletrack World Magazine
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SHIMANO XTR 4活塞碟掣鮑魚-散熱樹脂皮-BR-M9120 (w/N03A 金屬散熱皮) / SHIMANO XTR HYDRAULIC D BRAKE-METAL PAD-BR-M9120 (w/ N03A METAL PAD) - Chung Yung Cycle Co.
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