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1 year agotektro r559 nutted is usually an option for such an upgrade. r539 has shorter reach if needed
sure, preference for frames with canti-post but it is a big limiting factor. some touring frames from the 80s come with posts but center pull caliper were used earlier
I am using a Hifi Walker H2. It is a reasonable price, has bluetooth and no capacitive touch inputs. The UI is not great but the device is physically solid and works for me.
I pre-ordered a Tangara on their crowd funding. I am hopeful about the opensource hardware and software. Only reservation is capacitive touch scroll wheel.