John:
Could you look over my two most recent ride files from this weekend and let me know how it looks, as far as calibration. The 4/17 ride file was a 59 mile out and back gravel ride with about 14 miles of asphault thrown in. Any recommendation on a CRR for gravel riding. This was more of a medium pack gravel. The power put out on my end was more than the ride file shows based on perceived exertion, but I knew that before the ride started because I have not created a ride file for gravel. The 4/18 ride file was 54 mile loop of road riding with 2800 feet of elevation gain that started and ended in the same location. Also when looking at the ride file what should I be looking at to gauge calibration? Am I looking at the wind speed relative to bike speed? If so how much variance between the two speeds is considered acceptable? I would appreciate any information you could provide.
Calibration Analysis (John)
Calibration Analysis (John)
- Attachments
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- Velocomp_04_17_2021_0803_59_Miles.ibr
- 59 Mile Gravel Out and Back
- (1.11 MiB) Downloaded 125 times
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- Velocomp_04_18_2021_0929_54_Miles.ibr
- 54 Mile Road Loop
- (1.09 MiB) Downloaded 122 times
Last edited by dmwelk on Wed Apr 21, 2021 12:11 pm, edited 1 time in total.
Re: Calibration Analysis (John)
1) When looking at a ride file, I look to see if wind speed and bike speed are comparable. Unless riding in strong head/tail winds (which is obvious to see) then the graphs should be similar. Yours are, so the unit is properly calibrated.
2) For your gravel bike, riding in hard-packed gravel, I adjusted Crr up to 0.014, a value reported by a velocomp forum customer.
Corrected ride file and profile attached. Note that this profile uses the same sensor IDs as your road bike, so you will have to switch profiles manually.
2) For your gravel bike, riding in hard-packed gravel, I adjusted Crr up to 0.014, a value reported by a velocomp forum customer.
Corrected ride file and profile attached. Note that this profile uses the same sensor IDs as your road bike, so you will have to switch profiles manually.
- Attachments
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- Gravel_Corr_04_17_2021_0803_59_Miles.ibr
- (1.11 MiB) Downloaded 123 times
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- Gravel.ibp
- (373 Bytes) Downloaded 122 times
John Hamann
Re: Calibration Analysis (John)
John, thank you. Really appreciate the help.Velocomp wrote: ↑Wed Apr 21, 2021 1:51 pm 1) When looking at a ride file, I look to see if wind speed and bike speed are comparable. Unless riding in strong head/tail winds (which is obvious to see) then the graphs should be similar. Yours are, so the unit is properly calibrated.
Screen Shot 2021-04-21 at 1.45.11 PM.png
2) For your gravel bike, riding in hard-packed gravel, I adjusted Crr up to 0.014, a value reported by a velocomp forum customer.
Corrected ride file and profile attached. Note that this profile uses the same sensor IDs as your road bike, so you will have to switch profiles manually.
Re: Calibration Analysis (John)
John:Velocomp wrote: ↑Wed Apr 21, 2021 1:51 pm 1) When looking at a ride file, I look to see if wind speed and bike speed are comparable. Unless riding in strong head/tail winds (which is obvious to see) then the graphs should be similar. Yours are, so the unit is properly calibrated.
Screen Shot 2021-04-21 at 1.45.11 PM.png
2) For your gravel bike, riding in hard-packed gravel, I adjusted Crr up to 0.014, a value reported by a velocomp forum customer.
Corrected ride file and profile attached. Note that this profile uses the same sensor IDs as your road bike, so you will have to switch profiles manually.
I'm using the same bike for both road and gravel, I will just switch profiles when I do one surface over the other. I noticed that my friction number decreased when my CRR was raised from a .0087 for the road profile to .0140 for the gravel profile. My friction went from a mid 7.0 to around a 3.1. Should the friction have dropped? Seems as though it should have went up or at least remained the same.
Re: Calibration Analysis (John)
Oops...my bad.
I uploaded the wrong corrected gravel ride file and profile.
Ride with 0.014 Crr is attached.
I uploaded the wrong corrected gravel ride file and profile.
Ride with 0.014 Crr is attached.
- Attachments
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- Gravel014.ibp
- (372 Bytes) Downloaded 127 times
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- Gravel014_04_17_2021_0803_59_Miles.ibr
- (823.53 KiB) Downloaded 122 times
John Hamann