Old 07-15-20, 12:28 PM
  #6  
Miele Man
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Join Date: Jun 2014
Location: Ontario, Canada
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Bikes: iele Latina, Miele Suprema, Miele Uno LS, Miele Miele Beta, MMTB, Bianchi Model Unknown, Fiori Venezia, Fiori Napoli, VeloSport Adamas AX

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From Yellow Jersey in Wisconsin:

:The two sizes are 26.4mm and 27.1mm.
Generally premium quality bicycles use the smaller crown
race seat. The matching head cups are 30.0mm and 30.2mm so
one generally cuts a midprice frame and fork to the smaller
crown seat and larger head tube."

Cheers
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