Hi All,
I have a GEN III wireless pro and i have been using on my roadbike with no issues for a couple of years, and i am having some issues calibrating to my MTB, it doesnt have lockable forks, so i am having troubles with the Cal ride, coast downs and some of my rides are stating that they have a bad tilt. Is there a particular technique of positioning on the bike that i can use that will give a better calibration. I am not so concerned with the power numbers, more the consistancy of the numbers.
Dave
Calibration on a MTB with unlockable front shocks
Re: Calibration on a MTB with unlockable front shocks
MTB with flex shocks are difficult for the iBike. The changing position of the frame causes problems for the tilt sensor
1) Do not do coast downs
2) Do a cal ride, and do the best you can to ride on a level, smooth road. Don't move around on the bike while on the ride
3) If you can get a good cal ride, then you will be able to use your iBike. Please note that your wattage averages, say over a 30 second period, will be ok, but your instantaneous wattages won't, due to the flex frame problem.
1) Do not do coast downs
2) Do a cal ride, and do the best you can to ride on a level, smooth road. Don't move around on the bike while on the ride
3) If you can get a good cal ride, then you will be able to use your iBike. Please note that your wattage averages, say over a 30 second period, will be ok, but your instantaneous wattages won't, due to the flex frame problem.
John Hamann
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Re: Calibration on a MTB with unlockable front shocks
Also, you may not be able to use a crr typical of many low-pressure mtb tires. I don't know if a Gen III is designed the same way, but on a Newton, when trying to use a crr which results in the fric value exceeding 25, the Newton forces the fric value down to a default value, in my case 6.555. This results in a large, systematic underestimation of rolling resistance, which is an especially significant component of power during off-road riding.
The fric value override occurs even when the Issac software's "Check Calibration" recommends that a fric value higher than 25 be used...
The fric value override occurs even when the Issac software's "Check Calibration" recommends that a fric value higher than 25 be used...