Duprat Perforee (hollow arm, 3 pin)
Main Photo
Category:  Cranksets
Name:  Duprat Perforee (hollow arm, 3 pin)
Brand:  Duprat
Years:  1940 - ?
Country:  France
Added By: Righty Tighty on 02/28/10
Updated By: peterbman on 05/14/18
Additional Photos - click for full size
Duprat Perforee (hollow arm, 3 pin)Duprat Perforee (hollow arm, 3 pin)Duprat Perforee (hollow arm, 3 pin)Duprat Perforee (hollow arm, 3 pin)Duprat Perforee (hollow arm, 3 pin)Duprat Perforee (hollow arm, 3 pin)
 Verify Component Photos
Chainring CountDoubleBCD 
BB StyleCotteredPedal Threads14mm x 1.25mm (French)
BB Length Flutes None
Lengths 170Arm/Spider MaterialSteel
Front MarkingsBack Markings
Extractor Threading N/A (Cottered)  
General Information
These cranks have hollow arms, making them probably the lightest cottered steel cranks ever made.  Could be equipped with any number of chainring (or chainring pairs) designed for the 3-bolt pattern common to TA/Stronglight/etc cranks of the time period.
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Additional Resources
Resources:Reference & ChartsGear Calculator
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