Sakae/Ringyo (SR) Silstar
Main Photo
Category:  Cranksets
Name:  Sakae/Ringyo (SR) Silstar
Brand:  Sakae/Ringyo (SR)
Model:  Silstar
Years:  Late 1970's - Early 1980's
Country:  Japan
Weight:  183 grams,
Non-driveside crank arm only. Spider is modified, thus lighter than original design.
Added By: JAKE on 06/25/19
Updated By: JAKE on 06/25/19
Additional Photos - click for full size
Sakae/Ringyo (SR) SilstarSakae/Ringyo (SR) SilstarSakae/Ringyo (SR) Silstar
 Verify Component Photos
Chainring CountDoubleBCD 120mm
BB StyleSquare Taper (JIS)Pedal Threads9/16" x 20f (Italian)
BB Length Flutes Crank Arm;
Crank Arm (back side); Spider
Lengths 170Arm/Spider MaterialAluminum Alloy
Front MarkingsSILSTAR (at spindle end)Back Markings(from pedal-BB) S (longitudinal, stamped) 1 "JIS" (circle logo) "SR" (block letter logo) JAPAN 170 (size,mm) "79" above "K" in a circle (date code)
Extractor Threading 22x1mm (Standard)  
General Information
Odd BCD of 120mm. Less common triple "fluting" of  crank arms. Model year Nov/1979 per date code. "2 piece" construction of driveside crank assembly.
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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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