Shimano RD-1050, 105
Main Photo
Category:  Rear Derailleurs
Name:  Shimano RD-1050, 105
Brand:  Shimano
Primary Group:  105 1050 Series
Model:  RD-1050
Years:  1987 - 1989
Country:  Japan
Weight:  256 grams (avg)
View Weight List
Added By: JFischer on 07/10/07
Updated By: stedeu on 06/10/18
Additional Photos - click for full size
Shimano RD-1050, 105Shimano RD-1050, 105Shimano RD-1050, 105
Outer Plate MarkingsShimano 105Inner Plate MarkingsRD-1050
MaterialAluminum Alloy; SteelDesign Category
Attachment Bolt Size6mm Allen KeyCable Attachment Bolt Size5mm Allen Key
Shifting SystemsShimano SIS
Shimano STI
Cable AdjusterYes
Cage LengthShortMax Cog Size28
Max Chain Wrap26t wrap  
General Information
There are two versions of this rear derailleur.  The difference being the color of the outer plate, one version being black, the other silver.
-1050 is is the first indexed 105 group, it came with silver 6 speed shifters.  The 1988 UK catalogue shows the new 7 speed -1051 group as well as the 6-speed -1050.
See Incorrect Information? Log-in to submit report.  
Additional Resources
Resources:Reference & ChartsCatalogs
Component VariationsView Detailed List  Manage Variations
Variations of Component exist (Component is 1 of 2)BrandGroup
Shimano RD-1051, 105Shimano105 1050 Series
Component Groups
Primary Group NameBrandQuick InfoBrowse Group Components
105 1050 SeriesShimano1987 - 1989, Road RaceView 20 Components
Details:   Introduced in 1987 (first appearing in August 1986 Catalog for the 1987 Year) Shimano 105 would introduce  alot of new technologies that year. that would not be seen on Shimano 600 for another year. Technologies such as SLR (Shimano Linear Response) Brake systems in 1989 The grouppo was updated  for 7 speed and it was replaced by the 105SC group in 1990.
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)
User Comments
Required
  Loading Comments

By pressing Verify below, you express verification that the photos shown are indeed of the component listed. Please do not verify if you are not sure that all photos are of the correct item. If you identify a photo that is NOT of the correct item, please use the Report feature to flag that photo.

Note: You can not verify photos that you have uploaded.
WeightSourceNotesAdded By
257 GramsUnknown JFischer
255 GramsActual stedeu
VeloBase v.2.8.7 - a Fischer Frameworks application, Copyright ¬© (2024) - All rights reserved.
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Find the information on useful? Please consider donating a few dollars towards the web-hosting cost. Thank you.