VeloBase.com - Component: Shimano RD-A550, RX100

Shimano RD-A550, RX100

Category:	Rear Derailleurs
Name:	Shimano RD-A550, RX100
Brand:	Shimano
Primary Group:	RX100
Model:	RD-A550
Years:	1991 - 1994
Country:	Japan
Weight:	280 grams (Actual), measured x3, accurate
Added By:	JFischer on 04/22/09
Updated By:	Simonius Titius on 10/20/11
Additional Photos - click for full size

Outer Plate Markings	Shimano RX100	Inner Plate Markings	Shimano RD-A550
Material	Aluminum Alloy; Steel	Design Category	Slant parallelogram
Attachment Bolt Size	5mm Allen Key	Cable Attachment Bolt Size	5mm Allen Key
Shifting Systems	Shimano SIS Shimano STI Friction	Cable Adjuster	Yes
Cage Length	Short	Max Cog Size	28
Max Chain Wrap	28T

General Information
Made in both satin and polished finish versions. Inner swing plate and both cage plates are steel. This 7-speed model can be easily distinguished from the 8-speed RD-A551 by the same method as its 105 and 600 Ultegra brothers. The cable clamp support is conical on the 7 speed, smoothed on the 8 speed. There are many other subtle differences in geometry to cope with the extra width of the 8 speed cassette.
Quality:		Rarity:

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Additional Resources
Resources:	Reference & Charts Catalogs

Component Variations	View Detailed List Manage Variations
Variations of Component exist (Component is 1 of 2)	Brand	Group
Shimano RD-A551-GS, RX100	Shimano	RX100

Component Groups
Primary Group Name	Brand	Quick Info	Browse Group Components
RX100	Shimano	1989 - 1999, Sport & Recreation	View 14 Components
Details: Shimano RX100 was designed to provide a feeling of both style and high performance to the affordable lightweight sport bike. Featuring advanced Shimano functions like SIS, HG sprockets and SLR brakes. RX100 gives the entry level road bike the potential for performance in the Shimano tradition. Optionally available in a striking pure white colour treatment. Shimano RX100 components make possible a fashionable sport bike that's as beautiful as it is affordable.

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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