DR Cage Size

[paulvs]

How do you determine you derailer cage size(length)? ? ?

 

GS

SGS

Short Cage

Medium Cage

Long Cage

 

[singletrackmind]

On the biggest amount of teeth you use on the cassette

[Johan Bornman]

The longer your cage, the more slack the cage can take up. Picture the cage sweeping through an arc.

 

Longer cages can therefore handle a bigger difference between your maximum and minimum sprocket sizes in both front and back.

 

Jockeys are rated in teeth. Somewhere on the company website (I havenb't found it stamped on the Jockey itself, unfortunately), you'll find a cge length rating expressed in numbers of teeth.

 

You work out what you need by calculating like this:

 

Work in numbers of teeth only.

 

(Big blade plus largest sprocket) minus (Granny gear plus smallest sprocket)

 

This figure will give you the biggest possible difference between large and small. Make sure your jockey can handle at least this difference.

 

 

[paulvs]

thanks johnna