PRO Fork Steerer Di2 battery holder
The PRO Fork Steerer Battery holder, or PRO GAP CAP Di2 as it is officially called, allows you to put your Di2 battery in the fork steerer.
It is a short expander with integrated battery holder and it fits 1 1/8" steerer tubes.
Why would you ever do that, you ask?
Well.. not all bicycles have a seatpost capable of holding a Di2 battery. Think Canyon's VCLS seatposts, dropper posts or full-suspension mountain bikes. This expander is a pretty good solution to that problem, especially when used together with PRO stems (like the PRO Vibe for example).
There are a couple of other options if you cannot place your battery in the seatpost. The external-mount-for-internal-battery SM-BTC1 is one, but it's a bit chunky. Another option would be to put the battery in the downtube (if you can), or to use an external battery with the external battery holder.
Details & Specifications
|Shimano model number:||PRHS0110|
|E-Tube Port type:||SD50|
|Component series:||Non-series components NON (All)|