Shimano SL-A400, Exage 300EX - 7sp SIS
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Category:  Shifters
Name:  Shimano SL-A400, Exage 300EX - 7sp SIS
Brand:  Shimano
Primary Group:  Exage 300EX
Model:  SL-A400
Years:  1990's
Country:  Japan
Weight:  68.65 grams (avg)
View Weight List
Added By: JFischer on 01/24/11
Updated By: blacksand.aotearoa on 05/08/19
Additional Photos - click for full size
Shimano SL-A400, Exage 300EX - 7sp SIS
Shifter Type DowntubeAttachment Style Clamp-On;
Downtube Braze-on (standard)
Shifting Systems7sp Shimano SIS
Lever Markings
Lever MaterialAluminum  
General Information
Later version of the SL-A400 with the rear operating in SIS for 7sp freewheels.  Was used mostly with the 300EX groups through the 1990's, may have been around as early as the late 80's to be paired with the Shimano Light Action group as was the previous non-indexed version of these shifters with the same name.
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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 SL-A400, Light Action - non-indexShimanoLight Action
Component Groups
Primary Group NameBrandQuick InfoBrowse Group Components
Exage 300EXShimano1990 - 1999, Sport & RecreationView 9 Components
Details:   Exage 300EX group was placed at the lower end of Shimano's Road groups through the 1990's. 
Group NameBrandQuick InfoBrowse Group Components
Exage 400EXShimano1990 - 1992, Sport & RecreationView 5 Components
Light ActionShimanoSport & RecreationView 12 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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WeightSourceNotesAdded By
74 GramsUnknown Guidolol
63.3 GramsUnknownplus 6.7gm for rubber caps blacksand.aotearoa
Columbus Tubi
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