Sakae/Ringyo (SR) Custom-P5 (Sakae Laprade), early version
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Category:  Seat Posts
Name:  Sakae/Ringyo (SR) Custom-P5 (Sakae Laprade), early version
Brand:  Sakae/Ringyo (SR)
Primary Group:  Custom
Model:  CT-P5
Years:  1970's - 1980's
Country:  Japan
Weight:  280.75 grams (avg)
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Added By: watsondm on 01/28/10
Updated By: Tombo on 05/13/16
Additional Photos - click for full size
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Markings"SR Laprade" near clamp on both sides;
"MAX.HT"; {diameter}, "JAPAN";
{date-code}; "SR"
MaterialLight Alloy
Shaft DesignFlutedSaddle Attachment StyleSingle bolt
Saddle Attachment Bolt Size(s)6mm Allen KeyOverall Length 220mm / 190mm
Max Height 130mmSetback 25mm
General Information

The often copied SR Laprade seatpost.

Adding a photo of what looks like an earlier model.  The clamp is a rough finish and the polished stem ends abruptly without the "V" shape depicted in the other photos.  Also, the fluted design appears to be a bit thinner and longer (maybe an illusion).  I date this to when I purchased it - 1977. 
It was in use well before that - or so I was told.  Single bolt was considered state-of-the-art for easy saddle adjustment.

Added two pics of a customized/"tuned" (approx. 15g lighter) version with a - imo manually - reworked polished head & clamp. The SR Laprade logos were removed and the edges between post and head were reduced to achieve an almost fluent passage.

Quality:Rarity:
 
 
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Resources:Reference & ChartsCatalogs
Component VariationsView Detailed List  Manage Variations
Variations of Component exist (Component is 1 of 2)BrandGroup
Sakae/Ringyo (SR) Custom-P5 (Sakae Laprade)Sakae/Ringyo (SR)Custom
Component Groups
Primary Group NameBrandQuick InfoBrowse Group Components
CustomSakae/Ringyo (SR)View 7 Components
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 vintage-trek.com...)



 
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WeightSourceNotesAdded By
310 GramsActual flim
293 GramsActualfor 190mm / 27.2mm Tombo
270 GramsSpecfor 220mm SR Catalogue P-7 (1982) Tombo
250 GramsSpecfor 190mm -> SR Catalogue P-7 (1982) Tombo
Cinelli
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