Shimano FC-SL24, Selecta B1
Main Photo
Category:  Cranksets
Name:  Shimano FC-SL24, Selecta B1
Brand:  Shimano
Primary Group:  ALTUS
Model:  FC-SL24
Years:  1979 - Early 1980's
Country:  Japan
Added By: JFischer on 10/31/07
Updated By: MGTS on 01/15/14
Additional Photos - click for full size
Shimano FC-SL24, Selecta B1Shimano FC-SL24, Selecta B1Shimano FC-SL24, Selecta B1Shimano FC-SL24, Selecta B1Shimano FC-SL24, Selecta B1Shimano FC-SL24, Selecta B1Shimano FC-SL24, Selecta B1Shimano FC-SL24, Selecta B1
Chainring CountDoubleBCD N/A
BB StyleOCTA JointPedal Threads9/16" x 20 (English)
BB Length Flutes Crank Arm; Spider
Lengths 165; 170Arm/Spider MaterialAluminum Alloy
Front MarkingsSelectraBack MarkingsShimano Selectra Japan
Extractor Threading 22x1mm (Standard)  
General Information
Low end Shimano Crank from the late 80's.  Used a specalized splined bottom bracket that the crank rings/spider slipped over and then the crank arms slipped over.
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Additional Resources
Resources:Reference & ChartsCatalogsGear Calculator
Component Groups
Primary Group NameBrandQuick InfoBrowse Group Components
ALTUS / SELECTA SeriesShimano1978 - , RecreationView 6 Components
Details:   Introduced in 1978, updated in the 1981 Catalog.
Brand Information(click to expand)

Shimano Model Number Prefix List:

BB Bottom Bracket BL Brake Lever BR BRake
CB Coaster Brake CJ Cassette Joint CN ChaiN
CP Chain Protecto CR Chain Ring CS Cassette Sprockets
DF chain DeFlector DH Dynamo Hub FC Front Crank
FD Front Derailleur FE Fork Ends FH FreeHub
FS Front Suspension HB HuB HD HanDle bar
HP Head Parts (Head Set) HS Handle Stem IF Inter-3 Freehub
LP LamP MF Multi Freewheel PD PeDal
RD Rear Derailleur RH Rollerbrake Hub RM RiM
RR ReflectoRs RS Rear Suspension SB Shift Brake lever (Nexus, ?)
SC Speed Calculator (cycle computer) SF Single Freewheel Freilaufritzel SG Speed chanGe hub
SH SHoes SL Shift Lever Schalthebel SM SMall parts
SP Seat Post SQ Seat Quick release SS Single Sprocket
TL TooL WH WHeel ST Shift Brake Lever (STI, Rapid Fire, etc)
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