- Sep 29, 2012
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Something's bothering me about this whole chainring, +4% business.
I read somewhere Brad trains on normal rings and TT races on Osym rings.
If I knew my chain rings were overestimating my power by 4% (~20W), I would be bumping my power 20 watts for the race, so I was performing at my true threshold. 20W is a lot - enough to make a difference when looking at a power meter display.
So we're either saying
1. Brad only does 430W for real. (hence the 6.26 listed above) which looks like 450W with Osyms ring installed - OR -
2. Brad did 450W for real - and it displayed as 470W on his PM, but he's already fixed that back to 450W when talking about it later, in his book.
Apparently Brad is intelligent. And if acoggan knows the 4% difference, I'd be pretty confident Julich + Kerrison + Wiggins also knows.
Is this +4% Osym difference mentioned anywhere in his book?
My point being: subtracting 4% is very handy for acoggan who has an indirect commercial relationship with Sky and wishes to project an aura of Sky performance believability. It's also good for Sky to have any numbers published magically reduced as part of the subsequent discussion.
But it's not necessarily a given that the calculation has not already been done pre-publishing.
I read somewhere Brad trains on normal rings and TT races on Osym rings.
If I knew my chain rings were overestimating my power by 4% (~20W), I would be bumping my power 20 watts for the race, so I was performing at my true threshold. 20W is a lot - enough to make a difference when looking at a power meter display.
So we're either saying
1. Brad only does 430W for real. (hence the 6.26 listed above) which looks like 450W with Osyms ring installed - OR -
2. Brad did 450W for real - and it displayed as 470W on his PM, but he's already fixed that back to 450W when talking about it later, in his book.
Apparently Brad is intelligent. And if acoggan knows the 4% difference, I'd be pretty confident Julich + Kerrison + Wiggins also knows.
Is this +4% Osym difference mentioned anywhere in his book?
My point being: subtracting 4% is very handy for acoggan who has an indirect commercial relationship with Sky and wishes to project an aura of Sky performance believability. It's also good for Sky to have any numbers published magically reduced as part of the subsequent discussion.
But it's not necessarily a given that the calculation has not already been done pre-publishing.
