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| Category: | Bottom Brackets |
| Name: | Shimano BB-1050, 105 |
| Brand: | Shimano |
| Primary Group: | 105 1050 Series |
| Model: | BB-1050 |
| Years: | 1985 - 1988 |
| Country: | Japan |
| Weight: | 341 grams (Actual),
with crank bolts |
| Added By: | MGTS on 12/04/09 |
| Updated By: | JFischer on 11/13/10 |
Additional Photos - click for full size |
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| Bearing Size/Count per side | 1/4" / 9x9 | Spindle Markings | Shimano {shell width} = W= {given spindle length} Japan VIA D-5H {2 letter date code} CrMo |
| Fixed Cup Markings | Shimano Japan {thread} (a triangle) VIA {2 letter date code} | Adjustable Cup Markings | Shimano Japan {thread} (a triangle) VIA {2 letter date code} lockring: Japan {thread} (a triangle) |
| Spindle Style | Square Taper | Axle Material | Steel |
| Available Threadings | English/ISO: 1.370 x 24;
Italian: 36mm x 24 | Length(s) | |
| Tools Needed | Locknut Wrench;
Spanner, Locknut Wrench and Fixed Cup Wrench | | |
| Additional Resources |
| Resources: |  Reference & Charts Catalogs |
| Component Groups |
| Primary Group Name | Brand | Quick Info | Browse Group Components |
| 105 1050 Series | Shimano | 1987 - 1989, Road Race | View 20 Components |
| Details: Introduced in 1987 (first appearing in August 1986 Catalog for the 1987 Year) Shimano 105 would introduce alot of new technologies that year. that would not be seen on Shimano 600 for another year. Technologies such as SLR (Shimano Linear Response) Brake systems in 1989 The grouppo was updated for 7 speed and it was replaced by the 105SC group in 1990. |
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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