Older duotrap Fits many trek bikes (maybe others?). Had this one on a Trek Domane 4.2 2014 ish.
This only has Ant+ (no Bluetooth). I bought this used. Works but I don't have a compatible head unit (will work with Android phones with Ant+ or bike computers with ant+.
I don't have the wheel magnet or crank arm magnet to activate the sensors but they are easy to source.
https://www.dcrainmaker.com/2011/02/look-at-trekbontrager-frame-integrated.html
