Shimano BR-AD20, Adamas AX
Main Photo
Category:  Brakes
Name:  Shimano BR-AD20, Adamas AX
Brand:  Shimano
Primary Group:  Adamas AX
Model:  BR-AD20
Years:  1982 - 1983
Country:  Japan
Weight:  421 grams (avg)
View Weight List
Added By: JFischer on 10/12/07
Updated By: JFischer on 01/05/10
Additional Photos - click for full size
Shimano BR-AD20, Adamas AXShimano BR-AD20, Adamas AXShimano BR-AD20, Adamas AXShimano BR-AD20, Adamas AX
Design Category Roller CamCable Adjuster
Quick Release Attachment Bolt TypeExterior Nut
Cable Attachment BoltWrenchFront of Arm Markings
Back of Arm MarkingsReach CategoryLong Reach; Standard Reach
Min Reach57mmMax Reach73mm
General Information

The Adamas AX group was the lowest of the three AX groups which were released in 1982.

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Additional Resources
Resources:Reference & ChartsCatalogs
Component Groups
Primary Group NameBrandQuick InfoBrowse Group Components
Adamas AXShimano1982 - 1983, Touring & MTBView 13 Components
Details:   Base level of the 'AX' groupsets produced by Shimano, the Adamas group was supposed to be a touring minded group.  It ended up being only produced for a few years.
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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WeightSourceNotesAdded By
397 GramsUnknown JFischer
445 GramsActual JFischer
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