SunTour XC Expert MD
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Category:  Rear Derailleurs
Name:  SunTour XC Expert MD
Brand:  SunTour
Primary Group:  XCE
Model:  RD-XX00-GTB
Years:  Mid 1990's
Country:  Japan
Added By: JFischer on 03/03/10
Updated By: peterbman on 05/05/18
Additional Photos - click for full size
SunTour XC Expert MDSunTour XC Expert MDSunTour XC Expert MDSunTour XC Expert MD
Outer Plate MarkingsSunTour XC ExpertInner Plate Markings
MaterialAluminum Alloy; PlasticDesign CategorySlant parallelogram
Attachment Bolt Size5mm Allen KeyCable Attachment Bolt Size5mm Allen Key
Shifting SystemsSunTour AccuShift
Friction
Cable AdjusterYes
Cage LengthMediumMax Cog Size
Max Chain Wrap  
General Information
 
Quality:Rarity:
 
 
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Additional Resources
Resources:Reference & ChartsCatalogsExternal Resources
Component Groups
Primary Group NameBrandQuick InfoBrowse Group Components
XCE / XC ExpertSunTour1989 - , Mountain BikeView 9 Components
Details:   Originally labeled as XCE and introduced as the lower end of the XC line in the late 1980's, renamed as XC Expert in the early 90's.  Accushift compatible.  
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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