SunTour FD-RA00-SS, Radius
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Category:  Front Derailleurs
Name:  SunTour FD-RA00-SS, Radius
Brand:  SunTour
Primary Group:  Radius
Model:  FD-RA00-SSH
Years:  Late 1980's - Early 1990's
Country:  Japan
Weight:  99 grams (Actual),
Actual weight matches specified weight (clamp-on version). Braze-on version specified as 96g
Added By: greenebike on 07/25/11
Updated By: abuhugh on 11/15/23
Additional Photos - click for full size
SunTour FD-RA00-SS, RadiusSunTour FD-RA00-SS, RadiusSunTour FD-RA00-SS, RadiusSunTour FD-RA00-SS, Radius
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# Rings Designed For DoubleOuter Plate Markings
Inner Plate MarkingsMAEDA INS JAPAN VIAClamp Markings
Inner Clamp MarkingsDesign CategoryPivot Arm
Pivot Arm MarkingsSUNTOUR RADIUSPlate MaterialChrome plated steel
Clamp Style28.6mm ClampCable Attachment Bolt5mm Allen Key
CableStop YesClamp Bolt Type5mm Allen Key
Max Ring Difference 16T  
General Information
The Radius Group was at the lower end of Suntour's offering but still a full groupset and specified for 'racing' bikes rather than utiity machines (1991 catalogue). The SSH designation indicates the clamp-on version (the version shown here), the braze-on version was designated SSB (but still specified for a 28.6mm downtube in terms of chainline). Official front chainring tooth-difference was given as 16T (1991 catalogue) and the derailleur was intended for a 2x7-speed setup but I have succesfully used one of these with a 28-42-48T triple (7-speed) setup, i.e. 20T difference.
Quality:Rarity:
 
 
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Additional Resources
Resources:Reference & ChartsCatalogsExternal Resources
Component VariationsView Detailed List  Manage Variations
Variations of Component exist (Component is 1 of 2)BrandGroup
SunTour FD-RA00-SS, RadiusSunTourRadius
Component Groups
Primary Group NameBrandQuick InfoBrowse Group Components
RadiusSunTour1990 - 1992, Sport & RecreationView 10 Components
Details:   Early 90's group (found in 92 catalog.)
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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