SunTour Wishbone SL-XM20-7
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Category:  Shifters
Name:  SunTour Wishbone SL-XM20-7
Brand:  SunTour
Model:  SL-XM20-7
Years:  1993 - 1994
Country:  Japan
Added By: ronalfredmoreno on 08/25/21
Updated By: ronalfredmoreno on 08/25/21
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SunTour Wishbone SL-XM20-7SunTour Wishbone SL-XM20-7SunTour Wishbone SL-XM20-7SunTour Wishbone SL-XM20-7SunTour Wishbone SL-XM20-7
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Shifter Type Suntour WishboneAttachment Style Handlebar Mount
Shifting Systems7sp SunTour AccuShiftLever MarkingsSuntour Japan 7s
Lever MaterialPlastics; Rubber  
General Information
According to 1993 SR-SUNTOUR bicycle equipment, The Wishbone features a unique Y-shaped lever that allows the riders to make shifts ergonomically without removing their hands from the grips. It also features Multi-Mount positioning, making personalized anatomical placement of controls possible for the rider. It improves brake lever handling, too. Wishbone levers also allow for customized brake lever positioning.
Quality:Rarity:
 
 
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Additional Resources
Resources:Reference & ChartsCatalogsExternal Resources
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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Ritchey
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