Bontrager DuoTrap ANT+ / Bluetooth Sensor

Very easy to install (into a Trek Emonda SL7). The gasket kept folding over and going inside the chainstay when trying to set the unit in place, but a bit of string put between the seal and the hole, insert the unit, then pull the string out popped the seal into place easily. I've got shorter cranks (150mm) and the cadence magnet would only trigger when it was right behind the pedal axle. Second trip out, and the magnet went bye-bye (GPS plotted so I know exactly where it fell off..just to rub salt into the wound!) The spare speed sensor magnet is filling in for the lost one, which I have managed to secure in the correct place and seems to trigger a lot sooner than the proper one, so obviously a stronger magnet and less fussy about where it sits on the crank. Connected to a Bryton Ride computer, no problems detecting and reading the signals.

I bought this for my Trek with an inbuilt socket for this unit. It fits perfect and is very easy to connect. This unit has been well worth the money.