SunTour BL
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Category:  Front Derailleurs
Name:  SunTour BL
Brand:  SunTour
Model:  FD-1900
Years:  1980 - ?
Country:  Japan
Weight:  90 grams
Added By: cinco on 11/01/07
Updated By: cinco on 11/01/07
Additional Photos - click for full size
SunTour BLSunTour BL
# Rings Designed For DoubleOuter Plate MarkingsSuntour BL {on decal}
Inner Plate MarkingsMaeda Industries, Ltd. 4532 Japan {date code}Clamp Markings"Suntour" on front, "Maeda Ind. Ltd. Japan {clamp size}" on back
Inner Clamp MarkingsNoneDesign CategoryParallelogram
Pivot Arm MarkingsPlate MaterialAluminum
Clamp Style28.6mm ClampCable Attachment Bolt
CableStop OptionalClamp Bolt Type
Max Ring Difference 18T  
General Information
Outer cage plate is aluminum, inner is steel. Housing stop unscrews from body. Date code WJ.
Quality:Rarity:
 
 
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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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