For those that have or are sending me PM's asking for me to do the internal conversion for/with them- Calfee is now offering the same thing. Looks like a great way to go. Its possible to do it yourself with a little work but if you don't have the time- here is a great option. Good luck.
Calfee Design Offering Retrofits for an Internal Di2 System on Carbon Frames
(La Selva Beach, CA) Sept. 2010 – Calfee Design is now offering an elegant solution to retrofit carbon fiber frames with Shimano’s electronic Di2 shifting system. This internal system eliminates the need for cable ties, adhesives and external mounts. To achieve fully internal routing for the electronic shift cables, Calfee makes the necessary modifications to the wiring harness, battery, seat post and frame.
The innovation starts with a custom battery system. Calfee installs an aftermarket battery inside the seat post, secured by a bracket for easy removal. To charge, simply remove the seat post and plug in the provided charger to the base of the seat post. This eliminates the bulkier, externally mounted battery. Cables from the battery run down the seat tube where they split at the bottom bracket shell to the shifters and derailleurs.
Calfee Design has extensive experience repairing carbon fiber frames. This is critical in retrofitting carbon frames not necessarily designed for internal routing. Calfee amends the frame as needed, including the creation of access holes, at no detriment to the structural integrity of the frame. Proper repair and reinforcement is imperative to preserve ride quality and guarantee strength of the frame after the required changes have been made to the original structure.
Frames retrofitted to work with an internal Shimano Di2 system cannot readily be swapped between traditional shifting and electronic. However, modifications can be made in the future to remove the retrofit features and allow for traditional cables.
Currently, any make or model of carbon fiber frame is eligible for Calfee’s Di2 retrofit. Internal routing for SRM power meters is also available. There may be a few frames that are not compatible with an internal Di2 system, though none have been identified at this time. The retrofit package is priced to start at $500. Pricing includes the custom battery pack, an installed wiring harness and basic paint touch-ups. The process requires approximately 5 weeks for completion.
For more information, please contact: