Slapped a 105 Di2 groupset on my Al2 Gen 4
Never did a full groupset swap before. Honestly, hadn’t wrenched on a bike since the 00’s. QUITE a lot has changed! I donated the removed Claris groupset, which had about 500mi on it, to a local bicycle co-op. Well technically I traded it for a bottom bracket tool. Anyway, the build was quite doable aside from some dicey cable routing around the bottom bracket and out the drainage holes (see last photo). Mid way through the build I thought I was cooked since the frame is not routed for Di2. In hindsight I may go back and route the Di2 wires from the seat tube, down to the BB, up the downtube and then down the outside of the BB where the original cables ran. Either way the wires will have to contour the BB which is pretty tight. I didn’t do nearly enough research ahead of time as far as how the Di2 system worked. I had no idea there were any wires at all. I assumed it was wireless bc that’s kinda how it’s marketed and talked about (in my mind). I was surprised to see a battery! I thought each component had their own battery within. Anyone else do this build? How was your experience?