Shimano UA-100, Dura-Ace First Gen.
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Category:  Headsets
Name:  Shimano UA-100, Dura-Ace First Gen.
Brand:  Shimano
Primary Group:  Dura-Ace
Model:  UA-100
Years:  1973 - 1978
Country:  Japan
Added By: JFischer on 07/19/07
Updated By: MGTS on 01/18/16
Additional Photos - click for full size
Shimano UA-100, Dura-Ace First Gen.Shimano UA-100, Dura-Ace First Gen.Shimano UA-100, Dura-Ace First Gen.Shimano UA-100, Dura-Ace First Gen.Shimano UA-100, Dura-Ace First Gen.Shimano UA-100, Dura-Ace First Gen.Shimano UA-100, Dura-Ace First Gen.
 Verify Component Photos
Body MaterialSteelUpper Bearing Size
Lower Bearing SizeCrown Race SizeISO (26.4mm)
Upper Cup MarkingsTwo gooves running around the cupLower Cup MarkingsTwo gooves running around the cup
Available Threading English/ISO/Italian (25.4mm x 24TPI)Stack Height 
General Information
Shimano Dura-Ace on lock-nut.  In 75 this part was renamed the UA-100.  Probably uses 3/16" bearings, trying to confirm.


Quality:Rarity:
 
 
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Additional Resources
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Resources:Reference & ChartsCatalogs
Component VariationsView Detailed List  Manage Variations
Variations of Component exist (Component is 1 of 2)BrandGroup
Shimano UA-100, Dura-Ace (Black)ShimanoDura-Ace
Component Groups
Primary Group NameBrandQuick InfoBrowse Group Components
Dura-Ace, First GenerationShimano1973 - 1976, Road RaceView 34 Components
Details:   The introduction of Dura-Ace in the mid 1970's, along with the indroduction of the Shimano 600 group were Shimano's first attempts at a professional quality road racing component group.  The first Generation Dura-Ace was updated and renamed the 7100 series by around 1977/78.
Group NameBrandQuick InfoBrowse Group Components
Dura-Ace 7100Shimano1977 - 1984, Road RaceView 18 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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