Yesterday I was doing a high-spin recovery ride and my PowerTap Standard CPU cadence display would frequently read '---.' Power and speed readings never dropped, just cadence.
Does the CPU do this when cadence exceeds 140rpm (or whatever the upper limit for hub-sensed cadence)?
I don't think I was actually spinning at >140rpm, more like 120. However the cadence readings were very erratic, I imagine in large part because I was riding over a bumpy concrete-slap bike path.
Is all this to be expected? Is losing cadence an indication that the hub batteries are nearly gone (in the same way that losing HR means it's time to replace the CPU battery)?
In general, how many mile or months do hub batteries last?. Any rule of thumb regarding when to replace them?
Does the CPU do this when cadence exceeds 140rpm (or whatever the upper limit for hub-sensed cadence)?
I don't think I was actually spinning at >140rpm, more like 120. However the cadence readings were very erratic, I imagine in large part because I was riding over a bumpy concrete-slap bike path.
Is all this to be expected? Is losing cadence an indication that the hub batteries are nearly gone (in the same way that losing HR means it's time to replace the CPU battery)?
In general, how many mile or months do hub batteries last?. Any rule of thumb regarding when to replace them?