Spécialités TA ref 1500 Criterium
Main Photo
Category:  Cranksets
Name:  Spécialités TA ref 1500 Criterium
Brand:  Spécialités TA
Model:  ref 1500 Criterium
Years:  1960 - 1962
Country:  France
Added By: daveross on 01/31/08
Updated By: CV-6 on 04/09/15
Additional Photos - click for full size
Spécialités TA ref 1500 CriteriumSpécialités TA ref 1500 CriteriumSpécialités TA ref 1500 Criterium
Chainring CountSingleBCD 
BB StyleProprietaryPedal Threads14mm x 1.25mm (French)
BB Length Flutes Crank Arm
Lengths 160; 162.5; 165; 167.5; 170; 172.5; 175;
177.5; 180
Arm/Spider MaterialAluminum Alloy
Front Markingsnone or old-style TA logoBack MarkingsTA 21
Extractor Threading N/A  
General Information
This Criterium cranks had an old-fashioned 5-pin attachment to a choice of chainrings or adapteurs. The version in the photos has the pista adapteur with a single outside shoulder for mounting a 1/8" pista chainring. These cranks featured a transitional, proprietary attachment to the axle, sometimes referred to as half-cottered. The cotter pin had a recessed allen key socket and a threaded nut on the opposite end. The cotter could be removed by simply removing the nut and tapping on the end of the pin. The axle (and socket on the crank) had a half-square, half-round end which was more resistant to slippage than the older round cottered axle.  This design had the pin not taking any stress but merely holding the arm in place on the pear shaped axle
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Additional Resources
Resources:Reference & ChartsCatalogsExternal ResourcesGear Calculator
Brand Information(click to expand)

First introduced alloy chainrings which were used on a number of other company's crankarms, TA soon move on to producing their own crank arms as well and then expanded into other products.

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