Thread: Chainrings: Aluminium or steel? Biopace?
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Old 07-06-08 | 10:59 AM
  #4  
Henry
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Joined: Jul 2008
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The crank is Shimano 175mm (FC M400) with 5 arms . The rings are 48/38/28. The larger 2 rings are 110mm and the inner ring is 74mm.

The crank is aluminium but the present worn rings are steel (tested with my fridge magnet!).
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