Shimano HP-7500 (NJS), Dura-Ace (Track)
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Category:  Headsets
Name:  Shimano HP-7500 (NJS), Dura-Ace (Track)
Brand:  Shimano
Primary Group:  Dura-Ace 7500
Model:  HP-7500 (NJS)
Years:  Late 1970's - Mid 1980's
Country:  Japan
Weight:  153 grams,
140g w/out bearings
Added By: bmarsha on 03/26/17
Updated By: bmarsha on 03/26/17
Additional Photos - click for full size
Shimano HP-7500 (NJS), Dura-Ace (Track)Shimano HP-7500 (NJS), Dura-Ace (Track)Shimano HP-7500 (NJS), Dura-Ace (Track)Shimano HP-7500 (NJS), Dura-Ace (Track)Shimano HP-7500 (NJS), Dura-Ace (Track)Shimano HP-7500 (NJS), Dura-Ace (Track)Shimano HP-7500 (NJS), Dura-Ace (Track)Shimano HP-7500 (NJS), Dura-Ace (Track)
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Body MaterialSteelUpper Bearing Size25 - 5/32"
Lower Bearing Size25 - 5/32"Crown Race SizeISO (26.4mm)
Upper Cup MarkingsLower Cup Markings
Available Threading English/ISO/Italian (25.4mm x 24TPI)Stack Height 
General Information
NJS version of Dura-Ace HP-7500 track headset. 

Lock nut marked with 'NJS' insignia. 

Date code marked on crown race. Example shown manufactured 1978 | March (CC). 
Quality:Rarity:
 
 
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Additional Resources
Resources:Reference & ChartsCatalogs
Component VariationsView Detailed List  Manage Variations
Variations of Component exist (Component is 1 of 2)BrandGroup
Shimano HP-7500, Dura-Ace (Track)ShimanoDura-Ace 7500
Component Groups
Primary Group NameBrandQuick InfoBrowse Group Components
Dura-Ace 7500Shimano1977 - 1984, TrackView 9 Components
Details:   The Dura-Ace 7500 group is a track / fixed gear groupset produced by Shimano at approximately the same time as their Dura-Ace 10 group.  The 7500 series however did not use the 10-pitch design, but a standard chain and tooth size.
Group NameBrandQuick InfoBrowse Group Components
Dura-Ace 10, 7000 seriesShimano1977 - 1984, TrackView 8 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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