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| Category: | Brakes |
| Name: | SunTour Radius (by Dia-Compe) |
| Brand: | SunTour |
| Primary Group: | Radius |
| Model: | |
| Years: | Late 1980's - Early 1990's |
| Country: | Japan |
| Added By: | greenebike on 07/25/11 |
| Updated By: | JFischer on 08/03/11 |
Additional Photos - click for full size |
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 Verify Component Photos |
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Design Category  | Cantilever | Cable Adjuster | Yes |
| Quick Release | Yes | Attachment Bolt Type | Recessed Allen Key |
| Cable Attachment Bolt | | Front of Arm Markings | Dia-compe BRS Radius |
| Back of Arm Markings | 400 max 52 -40 min | Reach Category | Short reach; Standard Reach |
| Min Reach | 40mm | Max Reach | 52mm |
| Component Groups |
| Primary Group Name | Brand | Quick Info | Browse Group Components |
| Radius | SunTour | 1990 - 1992, Sport & Recreation | View 9 Components |
| Details: Early 90's group (found in 92 catalog.) |
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
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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 |
| |
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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
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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)
