Handlebar Climbing Shifter
The SW-R600 is a very old but still popular climbing shifter. It is expensive, bulky and attaches to your handlebars using tie-wraps, but it is one of the few Di2 climbing shifters.
An alternative would be the SW-R9150 remote satellite climbing shifter.
Details & Specifications
E-Tube Port type:
Non-series components NON (All)