SunTour BB-SL10, XC Pro
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Category:  Bottom Brackets
Name:  SunTour BB-SL10, XC Pro
Brand:  SunTour
Primary Group:  XC Pro
Model:  BB-SL10
Years:  1992 - 1994
Country:  Japan
Weight:  265 grams (Actual)
Added By: euphras on 11/06/12
Updated By: euphras on 11/16/12
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SunTour BB-SL10, XC ProSunTour BB-SL10, XC ProSunTour BB-SL10, XC ProSunTour BB-SL10, XC Pro
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Bearing Size/Count per side13 x 13Spindle MarkingsSUNTOUR ML-SL-68 Japan HG
Fixed Cup MarkingsMicrolite WTB Suntour Grease Guard Japan 1.37 x 24T HGAdjustable Cup MarkingsML Suntour Japan 1.37 x 24T HG
Spindle StyleSquare Taper (JIS)Axle MaterialCr-Mo
Available ThreadingsEnglish/ISO: 1.370 x 24;
Italian: 36mm x 24
Length(s)115 mm
Tools NeededSpanner, Locknut Wrench and Fixed Cup Wrench  
General Information
Microlite Microdrive version of the SunTour Grease Guard bottom bracket, optionally provided with the XC Pro MD, Superbe Pro and SL group. Suntours Microlite line of components was designed to deliver peak performance at ultra low weight. The cups and lock screw are made of aluminum, races are press-fitted steel. The spindle is hollow and grease can be pressed through grease ports (spindle screws) and holes in the area of the bearings in order to spill out old grease and dirt.
Quality:Rarity:
 
 
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Additional Resources
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Resources:Reference & ChartsCatalogsExternal Resources
Component Groups
Primary Group NameBrandQuick InfoBrowse Group Components
XC ProSunTour1990 - , Mountain BikeView 22 Components
Group NameBrandQuick InfoBrowse Group Components
SLSunTour1991 - 1994, Road RaceView 15 Components
Superbe ProSunTour1981 - 1994, Road RaceView 45 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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