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@Sig_Arlecchino
Possibly of interest for people using a mavic starfish on a track bike: fyxo is selling solid looking 1/8 130bcd chainrings for a reduced price, the 'design 4' comes pretty close to the original 631 chainrings. I just ordered one for my cyfac project. https://fyxo.co/collections/chainrings/products/chainring-130bcd-silver