Shimano RD-6401, 600 Ultegra
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Category:  Rear Derailleurs
Name:  Shimano RD-6401, 600 Ultegra
Brand:  Shimano
Primary Group:  600 Ultegra
Model:  RD-6401
Years:  1992 - 1997
Country:  Japan
Weight:  210 grams
Added By: JFischer on 10/15/07
Updated By: MGTS on 11/07/20
Additional Photos - click for full size
Shimano RD-6401, 600 UltegraShimano RD-6401, 600 UltegraShimano RD-6401, 600 UltegraShimano RD-6401, 600 UltegraShimano RD-6401, 600 UltegraShimano RD-6401, 600 UltegraShimano RD-6401, 600 UltegraShimano RD-6401, 600 Ultegra
 Verify Component Photos
Outer Plate MarkingsShimano 600 [tri color band]Inner Plate MarkingsCenteron G-Pulley
MaterialAluminum Alloy; SteelDesign CategorySlant parallelogram
Attachment Bolt Size5mm Allen KeyCable Attachment Bolt Size5mm Allen Key
Shifting SystemsShimano SIS
Shimano STI
Friction
Cable AdjusterYes
Cage LengthShortMax Cog Size28
Max Chain Wrap28  
General Information
Simlar in design to the 7-speed 6400 but with slightly different jockey cage.  The formerly aero lower cage now has the normal window. There was also a slight change in the silver paint of the outer plate. this version has more metallic flakes in the paint, making it more "sparkly" 
FD -6401 and RD-6401 are from the 8-speed group. 
Quality:Rarity:
 
 
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Additional Resources
Resources:Reference & ChartsCatalogs
Component VariationsView Detailed List  Manage Variations
Variations of Component exist (Component is 1 of 2)BrandGroup
Shimano RD-6400, 600 UltegraShimano600 Ultegra
Component Groups
Primary Group NameBrandQuick InfoBrowse Group Components
600 Ultegra, 6400 seriesShimano1988 - 1998, Road RaceView 32 Components
Details:  

 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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