SunTour CW-XP10, XC Pro MD (MicroDrive)  (Report Pending)
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Category:  Cranksets
Name:  SunTour CW-XP10, XC Pro MD (MicroDrive)
Brand:  SunTour
Primary Group:  XC Pro
Model:  CW-XP10
Years:  1990 - Early 1990's
Country:  Japan
Added By: JFischer on 07/18/11
Updated By: JFischer on 07/18/11
Additional Photos - click for full size
SunTour CW-XP10, XC Pro MD (MicroDrive)SunTour CW-XP10, XC Pro MD (MicroDrive)SunTour CW-XP10, XC Pro MD (MicroDrive)SunTour CW-XP10, XC Pro MD (MicroDrive)
Chainring CountTripleBCD 94mm/56mm
BB StyleSquare Taper (JIS)Pedal Threads9/16" x 20 (English)
BB Length Flutes None
Lengths 170; 175; 180Arm/Spider MaterialAluminum Alloy
Front MarkingsSunTour XC Pro MDBack MarkingsSunTour Japan [date code] [length]
Extractor Threading 22x1mm (Standard)  
General Information
SunTour's short lived 'MicroDrive' version of the XC Pro crank. 94mm BCD outer rings, 56mm BCD inner ring.
Reported By:DoctorRad
Report Date:2/24/2018
Report Reason:Incorrect Content, Also available in 177.5mm, I have a pair in this length.
 
Quality:Rarity:
 
 
Outstanding Report Submitted  
Additional Resources
Resources:Reference & ChartsCatalogsExternal ResourcesGear Calculator
Component VariationsView Detailed List  Manage Variations
Variations of Component exist (Component is 1 of 2)BrandGroup
SunTour XC ProSunTourXC Pro
Component Groups
Primary Group NameBrandQuick InfoBrowse Group Components
XC ProSunTour1990 - , Mountain BikeView 23 Components
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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