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Astra was the Beacon Cycle house brand, according to Sheldon. As @Blam and @Daniel R Hicks say, it's a mid-range 80s bike (that's a compliment)! The lugs, while nothing special, aren't drainpipe thick - this is a good thing. It was probably built well. Crankset may be Stronglight, and the derailleur and front mech are probably Sachs-Huret. Basic components ...


2

Unlike car disk brakes, there is not a lot of spare "meat" on bicycle rotors. "Machining" the rotors is not really feasible. If they are worn to the point grooves are causing performance issues, the rotors should be replaced. Sanding them down evenly (without expensive machining tools) will be next to impossible to remove scoring and maintain a uniform ...



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