The Salsa Vaya (and hopefully the forthcoming Motorless City bike) has the rear disc brake cable run along the top of the chain stay, which means the Garmin GSC-10 (Speed/Cadence Bike Sensor) cannot cleanly fit on the bike (photo). To work around this I picked up the Wahoo Cycling Speed/Cadence Sensor (a compatible ANT+ device) and thus far it seems like it’ll work just fine. I had no problems hanging both sensors below the chainstay, and my Garmin Edge 510 quickly picked up the sensor and was able to get both wheel rotation and cadence data from it.
This setup isn’t as attractive as Garmin’s single unit, and the need to double the cable back on itself looks a bit sloppy, but it does offer more flexibility and overall it should work out fine. I was also a bit disappointed that it doesn’t feature a Garmin unit-like test button/LED which makes setup super easy. It’s a bit higher priced than the Garmin sensor, so it’d be nice if it was at least identical feature-wise. It’s also a bit awkward how the entire sensor body needs to be pivoted in towards the spokes instead of a small/discrete arm, but I do think it’ll work out fine.
Since this was a test mounting I was a bit careless with the cable ties and didn’t peel the adhesive pads off of the cadence sensor, making for sloppy work. I intend to leave this (with its ugly, temporary fittings) in place for a month or so, and then hopefully after that it’ll be in place on the Motorless City bike.