| Chainring Count | Double | BCD  | 130mm |
| BB Style | Square Taper (JIS) | Pedal Threads | 14mm x 1.25mm (French);
9/16" x 20 (English) |
| BB Length | 119mm | Flutes | Crank Arm; Spider |
| Lengths | 165; 170 | Arm/Spider Material | Aluminum Alloy |
| Front Markings | SR Apex | Back Markings | Japan {date code} |
| Extractor Threading | 22x1mm (Standard) | | |
| Component Variations | View Detailed List Manage Variations |
| Variations of Component exist (Component is 1 of 2) | Brand | Group |
| Sakae/Ringyo (SR) AX-5MASL, APEX Super Light | Sakae/Ringyo (SR) | |
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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