Sakae/Ringyo (SR) chainring guard
Main Photo
Category:  Chainrings
Name:  Sakae/Ringyo (SR) chainring guard
Brand:  Sakae/Ringyo (SR)
Years:  N/A
Country:  Japan
Added By: peterbman on 04/14/14
Updated By: peterbman on 04/14/14
Additional Photos - click for full size
Sakae/Ringyo (SR) chainring guardSakae/Ringyo (SR) chainring guard
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Identifying Marks[SR logo]BCD 
Tooth Count RangeRing PositionChain Guard
Chain PitchChain Width
General Information
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Additional Resources
Resources:Reference & ChartsCatalogs
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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