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The outer ring is expanded at 200 °C and then fitted to the inner ring, creating a permanent bond for the life of the sprocket.","attributes":[{"label":"General Product Group","value":"Chain & Sprockets"},{"label":"General Product Type","value":"Sprockets & Components (Rear)"},{"label":"Variant Id","value":"279417"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/SR990-48_2EREN_2ETR/e754e79d5081f99d.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/SR990-48_2EREN_2ETR/e754e79d5081f99d.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/SR990-48_2EREN_2ETR/de421ddcb1048c2d.jpg"],"description":"Renthal Twin Ring Rear Sprocket 2240-520-48GPSI. This is the longest lasting and most durable off-road sprocket, developed over 5 years. The unique flat face design minimizes weight and keeps the TwinRing as narrow as a regular chainwheel. The inner ring is made of high-strength Ultralight 7075 T6 Aluminum, and the outer ring is Electroless Nickel Coated steel. 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