Shimano FC-6206 Biopace, 600EX (Triple version of FC-6207)
Main Photo
Category:  Cranksets
Name:  Shimano FC-6206 Biopace, 600EX (Triple version of FC-6207)
Brand:  Shimano
Primary Group:  600EX
Model:  FC-6206 Biopace
Years:  1984 - 1987
Country:  Japan
Weight:  700 grams (Spec),
Shimano catalog 1984, page 107
Added By: JFischer on 06/12/09
Updated By: ThermionicScott on 03/19/19
Additional Photos - click for full size
Shimano FC-6206 Biopace, 600EX (Triple versioShimano FC-6206 Biopace, 600EX (Triple versioShimano FC-6206 Biopace, 600EX (Triple versioShimano FC-6206 Biopace, 600EX (Triple versioShimano FC-6206 Biopace, 600EX (Triple versioShimano FC-6206 Biopace, 600EX (Triple versioShimano FC-6206 Biopace, 600EX (Triple versioShimano FC-6206 Biopace, 600EX (Triple versio
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Chainring CountTripleBCD 130mm / 110mm
BB StyleSquare Taper (JIS)Pedal Threads14mm x 1.25mm (French);
9/16" x 20 (English)
BB Length BSC (68mm) 121.5mm, ITAL (70mm) 124.5mmFlutes None
Lengths 165; 170; 175; 180Arm/Spider MaterialAluminum Alloy
Front MarkingsShimanoBack MarkingsFC-6206 VIA Japan [length] [date code]
Extractor Threading 22x1mm (Standard)  
General Information
Appears to be a fairly nice finished piece that was used as both part of the 600EX line, as well as the Deore XT M700 group (Deer Head), and later was also included in the "Z" series group which was a lower priced alternative to XT which was released in 1986 just before the redesign of the XT group in 87.

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Additional Resources
Resources:Reference & ChartsCatalogsGear Calculator
Component Groups
Primary Group NameBrandQuick InfoBrowse Group Components
600EX, 6200 seriesShimano1978 - 1987, Road RaceView 49 Components
Details:   The Shimano 600EX groupset was made in a multitude of variations and generations.  Often, more than one variation was being produced at the same time.  Included in the Shimano 600EX groupsets is the easily recognizable Arabesque group with detailed engravings and designs.  The 600EX group went from friction shifting at its introduction, to 6 speed SIS shifting later in the 1980's. 
Group NameBrandQuick InfoBrowse Group Components
Deore XT M700 SeriesShimano1983 - 1986, Touring & MTBView 11 Components
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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