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| Category: | Front Derailleurs |
| Name: | SunTour (unknown) |
| Brand: | SunTour |
| Model: | |
| Years: | 1987 - ? |
| Country: | Japan |
| Weight: | 124 grams |
| Added By: | cinco on 11/07/07 |
| Updated By: | titan_90 on 12/29/08 |
Additional Photos - click for full size |
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 Verify Component Photos |
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# Rings Designed For  | | Outer Plate Markings | None |
| Inner Plate Markings | Maeda Ind. Japan VIA {date code} | Clamp Markings | Suntour |
| Inner Clamp Markings | {clamp size} | Design Category | Parallelogram |
| Pivot Arm Markings | | Plate Material | Chrome plated steel |
| Clamp Style | 28.6mm Clamp | Cable Attachment Bolt | 8mm Wrench |
| CableStop | Yes | Clamp Bolt Type | 5mm Allen Key |
| Max Ring Difference | | | |
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 |
|
|
|
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1984 |
1985 |
1986 |
1987 |
1988 |
1989 |
1990 |
1991 |
1992 |
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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)
