Description
Rear Gear Changer Chrome MTB Saiguan rear derailleur
- Rear Gear Changer Normal Chrome MTB
- You Cannot Change Your Gear WIthout It
- High Quality Build Material
The rear derailleur basically derails the chain from the current sprocket, and attempts to put it accurately on the next sprocket. For folding bikes, the rear derailleur deserves special mention because of its vulnerability to damage, compared to large wheeled bikes. This occurs during transportation in the folded mode, where the rear derailleur may stick out and hit other objects. Also, the rear derailleur should not hang down too low, as it will be vulnerable to damage if it is too near the ground. Theoretically, the number of speeds that a rear derailleur can achieve is not fixed. The movement of the rear derailleur is not indexed, it just moves according to how much cable is pulled by the shifter. Which is why we can find 8 speed rear derailleurs being used for 9 speed systems or the other way round with no issues. You can use a 10 speed rated Ultegra RD with an 8 speed cassette and shifter. The compatibility issue is usually with the width of the cage, where wider 8 speed chains may not fit nicely through a narrow 10-speed-rated cage.
