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Rear Derailleur (RD)

Series

XTR

Deore XT

Deore LX

STX-RC

STX

Feature

RD-M950RD-M739RD-M567RD-MC36RD-MC38RD-MC34
SIS X XXXXX
Speed 8-speed8-speed8-speed7-speed 8-speed7-speed
IG cassette compatible XX
Teflon coated link bushings4 link bushings4 link bushings2 link bushings2 link bushings2 link bushings2 link bushings
Stainless steele nut & bolt X XXXXX

SS

Front difference
Total capacity
Max. rear sprocket
Min. rear sprocket

GS

Front difference 22T22T
Total capacity33T 33T
Max. rear sprocket 32T 32T
Min. rear sprocket 11T 11T

SGS

Front difference 22T20T20T20T20T20T
Total capacity 38T 39T39T37T39T37T
Max. rear sprocket 32T32T32T28T32T28T
Min. rear sprocket

11T

11T11T11T11T11T
Adaptor (rivet type) available
Adaptor for attachment type X X X X X
Direct attachment type X X X X X X

Bracket body

MaterialAluminumAluminumAluminumAluminumAluminumAluminum
FinishAnodized PolishedPaintedPolishedPolishedBarrel

Plate Body

Material AluminumAluminumAluminumAluminumAluminumAluminum
Finish AnodizedPolished Painted PolishedPolished Barrel

Outer link

Material AluminumAluminumAluminumAluminumAluminumSteel
Finish Anodized PaintedPaintedPolished PolishedChromica

Inner link

MaterialAluminum AluminumSteel SteelSteelSteel
Finish Anodized Painted PaintedPaintedPaintedPainted

Plate

Material AluminumAluminumSteel SteelSteelSteel
Finish AnodizedAnodized Chrome platedChromicaPearl brightChromica
RD-M950SGS plate material is steel RD-M739SGS plate material is steel New





In-depth Information About Metals

Aluminum
Aluminum is extracted electrolytically from bauxite ore. It is made by the electrolysis of aluminum oxide which is found in larger concentrations within bauxite ore. Bauxite is a mixture of the hydroxides of aluminum, together with other impurities such as oxides of iron, titanium, and silicon. Bauxite is produced by the weathering and change of aluminum silicate rocks usually found in tropical and semitropical regions where climate has produced an accelerated weathering process. Bauxite is not a rare ore and is widely available in the US, the Caribbean, and Europe. Approximately 4 pounds of read the full article...

Beryllium
Beryllium is a specialty metal that is steel-grey metal in color, with an extremely low density, making it very light weight. At 1.85 grams to the cubic centimeter, its density compares to that of magnesium. It is also a high strength metal, making it possible to design light weight, thin membered parts with ahigh stiffness. A column made of beryllium to support a load placed directly downward on top of it, will have a greater load carrying capacity, and be lower in weight than any other metal of equal size.

Until the 1950's beryllium was used read the full article...

Titanium
The element titanium was discovered in 1763 by an English cleric, William Gregor who was an amateur chemist with an inquiring mind. It was in the black sands of Cornwall that he discovered the new element that had up to that time, attracted little scientific interest. A few years later, an Austrian, Klaproth, extracted the same element from an ore widely known as "rutile", which is a mineral consisting of titanium dioxide (one titanium atom, two oxygen atoms), that is a reddish-brown substance with a slight metallic luster. While rutile is the highest grade read the full article...

Metallurgic Hardness Testing
There are three types of tests used with accuracy by the metals industry,they are the Brinell hardness test, the Rockwell hardness test, and the Vickers hardness test. Hardness is the property of a metal which gives it the ability to resist being permanently deformed (bent, broken, or have its shape changed), when a load is applied. The greater the hardness of the metal, the greater resistance it has to deformation. Since the definitions of metallurgic ultimate strength and hardness are rather similar, it can generally be assumed read the full article...


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