Shimano RD-AT11, ALTUS-ST
Main Photo
Category:  Rear Derailleurs
Name:  Shimano RD-AT11, ALTUS-ST
Brand:  Shimano
Primary Group:  ALTUS
Model:  RD-AT11
Years:  Late 1970's - Early 1980's
Country:  Japan
Weight:  303 grams (Spec)
Added By: JFischer on 09/25/10
Updated By: andypop1 on 06/25/11
Additional Photos - click for full size
Shimano RD-AT11, ALTUS-STShimano RD-AT11, ALTUS-STShimano RD-AT11, ALTUS-STShimano RD-AT11, ALTUS-STShimano RD-AT11, ALTUS-STShimano RD-AT11, ALTUS-ST
Outer Plate MarkingsInner Plate Markings
MaterialAluminum Alloy; SteelDesign CategoryInline parallelogram
Attachment Bolt SizeClawCable Attachment Bolt Size8mm Wrench
Shifting SystemsFrictionCable AdjusterYes
Cage LengthShortMax Cog Size28
Max Chain Wrap  
General Information
Also made in a long cage version, model number RD-AT21.
See Incorrect Information? Log-in to submit report.  
Additional Resources
Resources:Reference & ChartsCatalogs
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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