I think my PM is reading low (yeah yeah, I know).
But, when I put my data in from a recent event I would have to have a CRR of under .003 and a CdA of under .180 to come up with something remotely close to the power recorded for the ride.
I know for fact my combined CRR on those roads isn't under .003. So I used that. I put in the actual Weather Underground data to get the air density, put in accurate road grade average, etc.....
To arrive at a CdA of closer to what I'd expect, I'm having to put in 40w more into the calculator than I did. Which, coincidentally, is about how much lower this meter reads on the outdoor TT bike versus an indoor hub based Powertap stationary trainer setup to my exact fit coordinates.
Outdoors with my position and equipment, I ain't nowhere close to a .180 CdA. No freaking way.
Is the aeroweenie calculator acceptable enough to know my Stages I'm using was reading pretty damn low for the event?
I typed my data into my personal Excel calculator based on some of the Chung formulas and the CdA also had to be super low to make the power figure make sense.
I use this meter on my road bike also, shorter cranks there also (crits). Can't really tell due to high power surges in training rides and variable terrain.
But, when I put my data in from a recent event I would have to have a CRR of under .003 and a CdA of under .180 to come up with something remotely close to the power recorded for the ride.
I know for fact my combined CRR on those roads isn't under .003. So I used that. I put in the actual Weather Underground data to get the air density, put in accurate road grade average, etc.....
To arrive at a CdA of closer to what I'd expect, I'm having to put in 40w more into the calculator than I did. Which, coincidentally, is about how much lower this meter reads on the outdoor TT bike versus an indoor hub based Powertap stationary trainer setup to my exact fit coordinates.
Outdoors with my position and equipment, I ain't nowhere close to a .180 CdA. No freaking way.
Is the aeroweenie calculator acceptable enough to know my Stages I'm using was reading pretty damn low for the event?
I typed my data into my personal Excel calculator based on some of the Chung formulas and the CdA also had to be super low to make the power figure make sense.
I use this meter on my road bike also, shorter cranks there also (crits). Can't really tell due to high power surges in training rides and variable terrain.