I'm looking at getting picking up a used road bike so I can run 2 bikes. Mostly rim brake bikes available for prices I'm interested in and I'm fine with that. The ER9 is only available for hydraulic disc brakes, but could I pair it with some hydraulic rim brake calipers and use those with it?
I could see maybe using the wheeltop or something else, but I already have an eGR so it might be nice to have spare charging cables, batteries, etc.