Common issue I know but i have just moved my iBike Pro to my second bike and with a new speed/cadence sensor. I did a cal ride this morning and a 30km ride straight after, i havent done the coastdowns as there was too much traffic around. I found that for most of the ride, except when the iBike showed a gradient of greater than 1.5% i was showing 0 watts. Showing an average of 33.7 Watts for the entire ride. Have i stuffed something up? the speed and cadence looked about right for the exertion but the wattage was very low
Could someone please assist
Strange Readings
Strange Readings
- Attachments
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- iBike_09_17_2011_0758_30_km.csv
- Ride showing low wattage
- (1.18 MiB) Downloaded 268 times
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- iBike_09_17_2011_0749_3_km_CalRide.csv
- Calibration csv
- (134.63 KiB) Downloaded 276 times
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- 110917_cal_data.ibcd4m
- Calibration
- (293.43 KiB) Downloaded 266 times
Re: Strange Readings
I'm no expert, but I did notice that the Crr on the 30km file shows -0.0130 ie somehow this has been recorded as a negative figure. This has meant that your Rolling Resistance watts are shown as -99, whereas they probably should be about +40.
A more likely Crr would be circa 0.0050
Another calibration run is needed I'd suggest.
A more likely Crr would be circa 0.0050
Another calibration run is needed I'd suggest.
Regards,
Richard
Richard
Re: Strange Readings
Thanks Richard, will try another cal ride. I tweaked the CRR to 0.0050 and the wattage returned to what about what i expected.