PBR Ultra-Light Aluminium Hard Anodized Rear Sprocket 4320 - 525 4320 42 LDRace experience Thanks to many years of competition experience, PBR developped a wide range of high quality sprockets in collaboration with top teams. High wear resistance Reduces frictions High precision manufacturing Use of top quality gross material Chain pitch: 525. 0 Material: Aluminium Rear teeth: 42. 0 Rear type: 4320 Rear version: Ultra light self cleaning hard anodised
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