Im currently using garmin's sensors for my bikes, however I have some issues with one bike, as the chain stays are not straight as in my other rides. Garmin's device seems not to suit this particular frame, because of the shape of the chain stays it is not possible to the bike computer to catch both wheel's speed and cadence, even if I move the lil speed detector arm. For the record I want to say that the magnet for the cranks it's located into the pedal's axle and most ofbthe times I use metal spoke wheels the wheel's magnet rubs the sensor because the sensor moves due to chainstay's design.

Please feel free to give some advice on some reliable options. It doesnt matter if the speed sensor hast to be attached to the fork.

Thanks in advance.

Ronaldo