Sorry, just noticed you need an 11 speed sensor. I have a Garmin GSC 10 Speed/Cadence Bike Sensor. There is a newer version out now: http://www.amazon.com/Garmin-Bike-Speed-Sensor-Cadence/dp/B00JM6DKUA/ref=sr_1_1?ie=UTF8&qid=1428074091&sr=8-1&keywords=garmin+speed+cadence+sensor