Hi.
Bought a Speed Sensor 2 to use on my Canyon Endurance and Tac-X dumb trainer (Ultegra chainset, but using a Shimano drop-in wheel and 105 cassette for training purposes).
Paired fine, but speed seems to be very erratic, dipping to c.50% of actual every 3-5 seconds and then jumping back.
I've tried new battery, some padding in the battery connection, re-pairing, re-positioning, turning off unit blue-tooth etc.
Read a lot about magnetic interference, but can somebody tell me it the below readout is symptomatic of interference or a faulty unit? Only advice from Garmin was to take it out on the road and test (which is a faff (as I'm now set up for indoor trainer), so keen to know if anybody else has experienced this and possible solutions). If it is interference, then it's a bit of a dealbreaker!
Thanks