Unique and patented device that shifts the position of a road bike derailleur to allow the use of a wide-range MTB-style cassette.
It does not compromise shifting on the smaller sprockets of the cassette but enables the derailleur to work with a 40T cassette.

- Material: 6061 Aluminum
Compatibility:
- 10-speed cassette:
- 11-32: Not Required
- 11-34 / 11-36 / 11-40: Single chainring (for double chainring check derailleur capacity)
- 11-42: Not supported
- 11-speed cassette:
- 11-32: Not Required
- 11-34 / 11-36 / 11-40: Single chainring (for double chainring check derailleur capacity)
- 10-42 / 11-42: Not supported
- Weight: 19 g