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Questions and answers about sports

Identify a replacement shimano rear derailleur

4 min read

Asked by: Missy Doucet

How do I know what Shimano derailleur I have?

Shimano stamps the rear derailleur model number on the underside/lower plate of the parallelogram.

How do I find my Shimano model number?

The shifter can be identified by model number, which is stamped on the plastic perch (under the rubber hood).

How do I know what derailleur I need?

If you are replacing an existing derailleur on a bike, simply count the number of cogs on your cassette and you’re good to go. If your drivetrain’s speed is an unknown quantity, you can count the number of steps that your shifter runs through and add ‘one’ to determine the number of gears your drivetrain has.

Are all rear derailleurs the same?

Rear derailleurs vary in the length of the cage, or the amount of spacing between the top pulleys and the bottom. This length determines how many gears the chain can accommodate — a longer cage length can take in the slack from a larger range of gears, while a shorter chain is designed to work with a smaller range.

How do I know if I have a long or short cage derailleur?

Quote from video: So look for those markings on your derailleur. If you can't eyeball it to see if it's long or short again short is SS medium GS long is s GS.

What does GS mean on Shimano derailleur?

medium cage

There are two different models of Shimano rear derailleurs available. Shimano rear derailleurs are available in two types, SS (short cage) and GS (medium cage), depending on the model. The “cage” here refers to the length of the pulley cage (the unit that houses the two pulleys).

Do all derailleurs fit all hangers?

Every frame manufacturer could have different sos hanger design for each model of frame and different sos hanger for same frame but manufactured on different year. So when search replacement for your gear hanger you must be sure that hangers design is exactly same to original.

What is the difference between a medium and long cage derailleur?

Quote from video: Now the longer the cage the more of a difference in ratio between the smallest and biggest sprockets. And the smallest. And the biggest chain rings your rear derailleur will be able to take.

Are Shimano 10 and 11 speed compatibility?

Shimano’s mechanical 10- and 11-speed road shifters are not compatible with its 10- and 11-speed MTB derailleurs.

Which is better long cage or short cage derailleur?

It’s generally best to go for as short a derailleur cage as you can get away with, as long as you can avoid the chain contorting on the extremes of the cassette, such as using the largest on both sprocket and chainring. Smaller cages tend to have snappier gear changes, they’re lighter, and also less exposed to damage.

What does Shimano SGS mean?

Posted January 6, 2010. GS is the medium length cage and SGS is the long cage on the rear derailleur, if you ride a hardtail (and you don’t cross chain) then a GS will do, An SGS is better suited to a full suss as the chain growth needs to be taken up by the RD

What is SS in rear derailleur?

Quote from video: Похожие запросы

How can you tell ultegra?

Print. Shimano cranks are all identified with model information above or surrounding the area on the backside of the pedal threads. For example; FC-6700/6750 = Shimano Ultegra.

Can you use a 12 speed derailleur on 11 speed cassette?

So there you go folks, there is no difference in indexing spacing between 11 and 12 speed, the difference is all at the derailleur end. So you can’t use a 12 speed derailleur on an 11 speed setup or vice versa but you can you an xtr 12/11 speed shifter on an 11 speed drivetrain.

Are Shimano 10 and 11 speed compatibility?

Shimano’s mechanical 10- and 11-speed road shifters are not compatible with its 10- and 11-speed MTB derailleurs.

Can I use a 9 speed derailleur on a 7 speed cassette?

Can I use a 9-speed derailleur on a 7-speed cassette? The answer is yes because the rear shift ratio of 9-speed and 7-speed derailleurs is the same if you stay within the same brand.

Will a 10-speed derailleur work with 7 speed?

No, you cannot. A bike with a 7-speed cassette would also come with a 7-speed shifter and a chain that is compatible with 7-speed cassettes. This will make it impossible for a 10-speed derailleur to work on it. This is because a 7-speed shifter and a 10-speed derailleur have different pull ratios.

Can an 8 speed derailleur work on a 7 speed cassette?

6-, 7- and 8-speed gear is all cross-compatible in terms of chain width. The only time you’d hit a problem is if the shifter and the cassette weren’t made for the same number of gears, for example you could imagine a scenario (e.g. 7-speed cassette, 8-speed shifter) where you might click past the edge of the cassette.