From Wolf Tooth, which makes narrow wide chainrings that can be said to be the forerunner of front single chainrings, another unique item has joined the ranks.
The tampan is a part that the MTB rear derailleur can pull with Shimano's STI lever.
An item that can reduce chain drop to the utmost with cyclocross by setting a wide range of 11 to 42T with a front single or by inserting an MTB derailleur with a clutch at the rear.
If the frame has an internal cable and the cable outlet is close to the end, use the in-line model and insert the tampan between the cables near the handle.
There are two types, one for 10-speed and one for 11-speed.
* 10-speed version is not compatible with ST-4700.