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| Category: | Hubs |
| Name: | Shimano Dura-Ace Low Flange First Gen |
| Brand: | Shimano |
| Primary Group: | Dura-Ace |
| Model: | HS-731 / HS-831 |
| Years: | 1973 - 1977 |
| Country: | Japan |
| Weight: | 510 grams |
| Added By: | JFischer on 07/19/07 |
| Updated By: | Concor on 06/03/12 |
Additional Photos - click for full size |
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Gear Compatibility  | Freewheel | Front Bearing Size/Count | 3/16" /11x11 |
| Rear Bearing Size/Count | 1/4" / 9x9 | Rear Spacing | 120mm |
| Spoke Drilling | 28; 32; 36 | Flange Size | Low Flange |
| Gear Threading/Pattern | English/ISO: 1.375 x 24 TPI | Body Markings | Shimano logo |
| Axle Material | Steel | Shell Material | Aluminum |
| Additional Resources |
| Resources: |  Reference & Charts Catalogs |
| Component Groups |
| Primary Group Name | Brand | Quick Info | Browse Group Components |
| Dura-Ace, First Generation | Shimano | 1973 - 1976, Road Race | View 35 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. |
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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