Hi everyone,
I recently bought a Powerpod, but since I do not have any experience in riding with power I’m wondering if my numbers are correct. Especially in the downhill parts where my power regularly drops to zero even if I definitely feel a considerable resistance when pedaling.
On the uphill parts the numbers seem more reasonable to me, maybe even a bit high. So I wondered if maybe something is wrong with my configured CdA, since this would be a big factor in the downhills, but negligible in the uphills, right? So I took a look into my profile and the value for CdA there is 0,351 which appears rather low to me, since I’m riding a MTB (on the tracked ride I was only riding on roads). Maybe I did something wrong during the initial setup? There was no option for MTB and since English is not my mother tongue I was a little uncertain what to pick.
Or maybe the numbers are off because I had my son with me on the ride in an iBert (front mounted seat). I accounted for this by adding his and the seats weight in the Powerpod profile. Would this mess with the estimated power? Although I also experience the same when going downhill without him (and without the extra weight added to the profile).
Or maybe the numbers are not off at all and I just suck at throwing down some wattage downhill?
Maybe someone could take a look at my attached file and see if something is off there? Just so you know: since my power regularly dropped to zero when pedaling downhill I simply stopped pedaling when going downhill at a certain point oft the ride, so I am mainly interested in the part aroud km 4-5. Also around km 20-21 my power was mainly zero, though my cadence was around 90 and my heart rate even increased.
Thanks in advance!
Numbers too low downhill?
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Numbers too low downhill?
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- iBike_06_15_2018_1426_24_km.ibr
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Re: Numbers too low downhill?
Any help on this would really be greatly appreciated!
Re: Numbers too low downhill?
I'm seeing some variation in your slope correction. This might be because you have your son in a front seat; this would tend to exaggerate the effects of bike angle changes on uphills and downhills.
I agree your CdA is low; it should be around 0.49. I fixed this in the attached profile.
A higher CdA will also increase watts while on downhills.
Finally, make sure your suspension is on lockout. This could have a big influence on things.
I agree your CdA is low; it should be around 0.49. I fixed this in the attached profile.
A higher CdA will also increase watts while on downhills.
Finally, make sure your suspension is on lockout. This could have a big influence on things.
- Attachments
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- iBert.ibp
- (415 Bytes) Downloaded 136 times
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- iBert_06_15_2018_1426_24_km.ibr
- (246.63 KiB) Downloaded 136 times
John Hamann