Dura Ace GA-100
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Category:  Cranksets
Name:  Dura Ace GA-100
Brand:  Shimano
Primary Group:  GA-100
Model:  GA-100
Years:  Mid 1970's - ?
Country:  Japan
Added By: Portfolio360 on 10/09/18
Updated By: Portfolio360 on 10/09/18
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Dura Ace GA-100Dura Ace GA-100Dura Ace GA-100Dura Ace GA-100Dura Ace GA-100Dura Ace GA-100Dura Ace GA-100Dura Ace GA-100Dura Ace GA-100
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Chainring CountLarge/outer chainring ONE piece with spiderBCD 151mm
BB StyleSquare Taper (JIS)Pedal Threads9/16" x 20 (English)
BB Length 107Flutes Crank Arm; Spider
Lengths 165; 167.5; 170; 172.5; 175Arm/Spider MaterialAluminum Alloy
Front MarkingsBack Markings
Extractor Threading   
General Information
Mid 70s DURA ACE GA-100 1st Generation BIA Track Crankset 
Pictured:
Date Codes: CRANK (A-G: July 1976) 
CHAINRING (Z-K: November 1975), BIA (pre NJS)
46t  Chainring
165 Crank Arms
151 BCD
9/16 x 20t Pedal Threads
Very Rare & Collectible. Hard to source information aside from catalog.

Not to be confused with Shimano Dura Ace FC-7500 Track. Manufactured during late 70s, (stamped NJS)


Quality:Rarity:
 
 
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Component Groups
Primary Group NameBrandQuick InfoBrowse Group Components
GA-100ShimanoView 1 Components
Brand Information(click to expand)

Shimano Model Number Prefix List:

BB Bottom Bracket BL Brake Lever BR BRake
CB Coaster Brake CJ Cassette Joint CN ChaiN
CP Chain Protecto CR Chain Ring CS Cassette Sprockets
DF chain DeFlector DH Dynamo Hub FC Front Crank
FD Front Derailleur FE Fork Ends FH FreeHub
FS Front Suspension HB HuB HD HanDle bar
HP Head Parts (Head Set) HS Handle Stem IF Inter-3 Freehub
LP LamP MF Multi Freewheel PD PeDal
RD Rear Derailleur RH Rollerbrake Hub RM RiM
RR ReflectoRs RS Rear Suspension SB Shift Brake lever (Nexus, ?)
SC Speed Calculator (cycle computer) SF Single Freewheel Freilaufritzel SG Speed chanGe hub
SH SHoes SL Shift Lever Schalthebel SM SMall parts
SP Seat Post SQ Seat Quick release SS Single Sprocket
TL TooL WH WHeel ST Shift Brake Lever (STI, Rapid Fire, etc)
 
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