Shimano FC-M450, Exage Mountain
Main Photo
Category:  Cranksets
Name:  Shimano FC-M450, Exage Mountain
Brand:  Shimano
Primary Group:  Exage Mountain
Model:  FC-M450
Years:  1987 - 1988
Country:  Japan
Added By: bikeboombikes on 12/10/11
Updated By: bikeboombikes on 12/24/11
Additional Photos - click for full size
Shimano FC-M450, Exage MountainShimano FC-M450, Exage MountainShimano FC-M450, Exage MountainShimano FC-M450, Exage Mountain
Chainring CountTripleBCD 110mm / 74mm
BB StyleSquare TaperPedal Threads9/16" x 20 (English)
BB Length Flutes None
Lengths 170; 175Arm/Spider MaterialAluminum Alloy
Front MarkingsBack Markings
Extractor Threading   
General Information
The Exage Mountain group (M450) was used on mountain bikes in the late 80s (e.g. 1988 Nishiki Colorado).  It is a 7 speed SIS group with a Biopace Triple crankset and a Cantilever/U-brake combination.  The Biopace chainrings 28-38-48T are steel.  The Exage Mountain group (M450) coexisted with a complementary Exage Sport road group (A450).  An interesting note is that, while the model number designated on the right-side (drive-side) Exage Mountain crank arm is FC-M450, the left side crank arm only says "450".  I wonder if this is to allow the same left side crank arm part to be used for both the M450 and A450 cranksets?  Anyone have an FC-A450 set to compare this to?
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Additional Resources
Resources:Reference & ChartsCatalogsGear Calculator
Component Groups
Primary Group NameBrandQuick InfoBrowse Group Components
Exage MountainShimanoSport & RecreationView 3 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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Brooks Saddles
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