SunTour Vx-GT
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Category:  Rear Derailleurs
Name:  SunTour Vx-GT
Brand:  SunTour
Model:  RD-2400
Years:  1977 - 1981
Country:  Japan
Weight:  205 grams (avg)
View Weight List
Added By: JFischer on 11/10/07
Updated By: racingbicyclefan10094 on 03/13/19
Additional Photos - click for full size
SunTour Vx-GTSunTour Vx-GTSunTour Vx-GTSunTour Vx-GT
Outer Plate MarkingsSunTour VxInner Plate MarkingsMaeda Industries Japan VIA
MaterialAluminum Alloy; SteelDesign Category
Attachment Bolt Size5mm Allen KeyCable Attachment Bolt Size8mm Wrench
Shifting SystemsFrictionCable AdjusterYes
Cage LengthLongMax Cog Size34
Max Chain Wrap34  
General Information

SunTour took the V T-Luxe and replaced the last bits of steel with aluminum pieces, and slimmed down some of the parts to a slimmer and neater package, the result was the Vx. The Vx was introduced in 1977.

----
The first V was made in about 1970. 

Disraeligears shows a Vx first type as 1976 only, in medium 59mm cage length without the quickcage or the pillar to stop the cage rotating too far back.  

The Vx second type is shown by Disraeligears in 1977 and by Ron Kitching in 1984 (unchanged?) in three lengths:

RD-2200 Vx    (short 47mm no quickcage)   200g 26T cog / 24T wrap
RD-2500 Vx-S (med 59mm quickcage)  213g.  Suganoya.net 26T/27T. RonKit'84 26T/28T wrap. Suntour say 30T cog /28T wrap on long 29mm hanger.
RD-2400 Vx-GT (long quickcage)  Suganoya.net and RonKit'84 give 34T/34T.

Early Vx derailleurs have a fixed top pivot stop in place of the B-screw; the B-screw had eclipsed the fixed stop by 1980.

Quality:Rarity:
 
 
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Component VariationsView Detailed List  Manage Variations
Variations of Component exist (Component is 1 of 2)BrandGroup
SunTour Vx SSunTourVx
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
210 GramsSpecRon Kitching '84, suspiciously identical to medium cage model. Simonius Titius
200 GramsUnknown racingbicyclefan10094
Eddy Merckx
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