Derailleur drop extension for mounting sprocket set up to 50 teeth for road bikes and MTB with single front sprocket. With this adapter you can mount a larger free wheel to make the most extreme climbs less heavy. Works with any 1-11v or 1-10v. With double front max 42 teeth. Made of anodized red aluminum.
You can see how it works on Youtube here: https://www.youtube.com/watch?v=zQGRDfhL7fo
This product was added to our catalog on Thursday 23 May, 2019.