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Do I need to redo my cds and 4-miles ride?
Posted: Tue May 20, 2008 11:36 pm
by mccork
I had to alter the position of my iBike on my bike, so obviously the tilt is now different. To get proper power readings I have to recalibrate the tilt before each ride because the tilt in my profile is no longer correct. Do I have to re-do my coast downs and 4-mile to correct this, or can I somehow correct the tilt in the profile that I already have?
Thanks in advance.
Kevin
Re: Do I need to redo my cds and 4-miles ride?
Posted: Wed May 21, 2008 1:09 am
by travispape
mccork wrote:I had to alter the position of my iBike on my bike, so obviously the tilt is now different. To get proper power readings I have to recalibrate the tilt before each ride because the tilt in my profile is no longer correct. Do I have to re-do my coast downs and 4-mile to correct this, or can I somehow correct the tilt in the profile that I already have?
Thanks in advance.
Kevin
The new tilt angle of the iBike will cause some difference in the WindScaling parameter. How much depends mostly on the amount of the tilt and where it is now in your airstream. A new calibration set would be best, but you can try going with the old profile to see how well it works. If you find problems with your wind data on a consistent basis, you'll know it's time to redo the cal ride.
Travis
Re: Do I need to redo my cds and 4-miles ride?
Posted: Wed May 21, 2008 8:25 am
by mlennox
mccork wrote:I had to alter the position of my iBike on my bike, so obviously the tilt is now different. To get proper power readings I have to recalibrate the tilt before each ride because the tilt in my profile is no longer correct. Do I have to re-do my coast downs and 4-mile to correct this, or can I somehow correct the tilt in the profile that I already have?
Thanks in advance.
Kevin
Under the advanced profile settings I think you can press a button "Get from iBike" to get the current Tilt Calibration number, then accept the change and your profile now has the new tilt... I think.
Re: Do I need to redo my cds and 4-miles ride?
Posted: Wed May 21, 2008 8:32 am
by Site_Admin
IMO, if you have to physically move the mount, you need to redo your tilt, wind, and do some CD's and an o & b. It's just the best option for solid data.
Re: Do I need to redo my cds and 4-miles ride?
Posted: Wed May 21, 2008 10:18 am
by travispape
mlennox wrote:Under the advanced profile settings I think you can press a button "Get from iBike" to get the current Tilt Calibration number, then accept the change and your profile now has the new tilt... I think.
Yes, that will get your nominal tilt calibration into your iBike2 profile. Whenever you send the profile to the unit, it's tilt cal will already be close; however, that does not do away with the need to check your tilt calibration daily.