Shimano #6439807 B-type shifter adapter, 600EX
Main Photo
Category:  Shifters
Name:  Shimano #6439807 B-type shifter adapter, 600EX
Brand:  Shimano
Primary Group:  600 Ultegra
Model:  6439807
Years:  N/A
Country:  Japan
Added By: cudak888 on 07/28/12
Updated By: cudak888 on 07/29/12
Additional Photos - click for full size
Shimano #6439807 B-type shifter adapter, 600EShimano #6439807 B-type shifter adapter, 600EShimano #6439807 B-type shifter adapter, 600EShimano #6439807 B-type shifter adapter, 600EShimano #6439807 B-type shifter adapter, 600EShimano #6439807 B-type shifter adapter, 600E
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Shifter Type AdapterAttachment Style Downtube - Top Mount
Shifting Systems6sp Dura-Ace SIS
6sp Shimano SIS
7sp Dura-Ace SIS
7sp Shimano SIS
8sp Dura-Ace SIS
8sp Shimano SIS
Lever Markings
Lever MaterialSteel  
General Information
Top-mount adapter for the 600EX (6400-series) levers; essentially an updated variant of the same B-type braze-on mount left over from the Dura-Ace 7200, revised for mounting of the standardized SIS-type index shifters.

Frame photo shows braze-on for the earlier variant of the Shimano B-type braze-on mount (used with Dura-Ace 7200).
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Additional Resources
Resources:Reference & ChartsCatalogs
Component Groups
Primary Group NameBrandQuick InfoBrowse Group Components
600 Ultegra, 6400 seriesShimano1988 - 1998, Road RaceView 32 Components

 Shimano added the word 'Ultegra' to their 600 group set in 1988 with the introduction of the 6400 series groupset.  Also often recognized by the tri-color stripe on many of the parts. 

The Ultegra group was developed to provide a high-performance racing type bicycle for amateur racers and performance oriented sports cyclists. Ultegra features polished bearing races, high strength steels, a striking modern colour treatment and compact high-tech design theme. This approach creates a new upgraded image for a fashionable high quality racing-type bicycle aimed at the performance cycling enthusiast. (1991 Dealer Manual)

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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