Sakae/Ringyo (SR) CUSTOM-3
Main Photo
Category:  Cranksets
Name:  Sakae/Ringyo (SR) CUSTOM-3
Brand:  Sakae/Ringyo (SR)
Years:  1970's - 1980's
Country:  Japan
Weight:  660 grams (Actual)
Added By: ininbita on 02/28/11
Updated By: jtyr71 on 12/19/21
Additional Photos - click for full size
Sakae/Ringyo (SR) CUSTOM-3Sakae/Ringyo (SR) CUSTOM-3Sakae/Ringyo (SR) CUSTOM-3
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Chainring CountDoubleBCD 86mm
BB StyleSquare Taper (JIS)Pedal Threads
BB Length Flutes Crank Arm
Lengths 165Arm/Spider MaterialAluminum Alloy
Front Markings"SR", "MELT.FORGING" and bird draw. "CUSTOM-3" on chainringsBack MarkingsCUSTOM
Extractor Threading 22x1mm (Standard)  
General Information
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Additional Resources
Resources:Reference & ChartsCatalogsGear Calculator
Brand Information(click to expand)
Date of Manufacturing / Production Code for SR seatposts (at least for the 80's):
The date of prodcution of SR (Laprade) seatposts is shown around the min.insert line as follows:
"letter"-"double digit number", e.g. F-81 oder L-81, while the letter should be the month and the number will be the year of production.
So F-81 seems to be June 1981 while L-81 would indicate December 1981.
(in-line with the code 1 examples on

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