Originally Posted by dorkypants
Anyone successfully mount a Garmin GSC10 (speed and cadence sensor) on a Bike Friday, specifically an Air Friday? Looks to me like the distance between the cranks and the spokes on the back wheel exceeds the reach of the 2 sensors on the GSC10
I see what you're saying. The pedals do not cross the arc of the wheel (and vis-versa)
Wheel RPM (speed) is either the primary or secondary source of MPH/KPH calculations ... depending on the Garmin GPS device you have. If the primary is not available, the device defaults to the secondary.
Either way, for the most part, MPH/KPH will be established with or without a wheel RPM (speed) sensor.
Cadence ... there is no substitue. It's either there or not. I would set the device to read cadence and then let the GPS receiver (via position and time) calculate your speed.
Unless you're good at disassembling small electronic devices and wiring a "jumper" wire between the two sensors ...