SunTour aRX GT
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Category:  Rear Derailleurs
Name:  SunTour aRX GT
Brand:  SunTour
Primary Group:  ARx
Model:  RD-4500
Years:  1983 - ?
Country:  Japan
Weight:  257.67 grams (avg)
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Added By: JFischer on 01/09/08
Updated By: rc on 05/12/14
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SunTour aRX GTSunTour aRX GT
Outer Plate MarkingsSuntour aRXInner Plate MarkingsMaeda Ind. Japan {date code}
MaterialAluminum Alloy; SteelDesign Category
Attachment Bolt Size6mm Allen KeyCable Attachment Bolt Size4mm Allen Key
Shifting SystemsFrictionCable AdjusterNo
Cage LengthLongMax Cog Size34
Max Chain Wrap32  
General Information
Also available with long cage. Pictured short cage date code ZD. Pictured long cage date code ZH.
Quality:Rarity:
 
 
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Resources:Reference & ChartsCatalogsExternal Resources
Component VariationsView Detailed List  Manage Variations
Variations of Component exist (Component is 1 of 2)BrandGroup
SunTour aRX (short cage)SunTourARx
Component Groups
Primary Group NameBrandQuick InfoBrowse Group Components
ARxSunTourRecreationView 5 Components
Brand Information(click to expand)

SunTour (Maeda)

SunTour derailleurs have a two-letter date code. On rear derailleurs the code is stamped on the back side of the inner parallel arm. On front derailleurs it is stamped on the back side of the inner cage.

The first letter represents the year. Larry Osborn and I believe O (Oh) is 1972, V is 1979 and A is 1984. As with Shimano, the second letter is the month code, where A is January and L is December.

SunTour Year Code

N
O
P
Q
R
S
T
U
V
W
X
Y
Z
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
 
A
B
C
D
E
F
G
H
I
1984
1985
1986
1987
1988
1989
1990
1991
1992

SunTour Month Code

A
B
C
D
E
F
G
H
I
J
K
L
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

The earliest Suntour derailleur I have found with a code is marked OF. A rear derailleur marked OD (corresponding to April of 72) was reported by Leighton Walter. I have a bike that dates from between 1970 to 1972 that has the original SunTour derailleurs. These derailleurs do not have date codes on them, so I believe the coding started sometime between 1970 and April of 1972.

(source: vintage-trek.com)

 
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WeightSourceNotesAdded By
280 GramsUnknown JFischer
250 GramsUnknown JFischer
243 GramsActual rc
Malvern Star
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