Valbrona wrote:Your deeper section rim would probably have been better on the front. By the time the air reaches your rear wheel it is 'dirty' and as such there is less of a need for a deeper section rim than at the front.
This might be true in a scenario where there are only two rims left on the surface on the earth.
Under real circumstances your argument, reduced to rim depth only holds true but, imho, provides less than ideal results.
Ignoring shpae for a moment, while 7cm front and 6cm rear might be more aero (not necessairly better) than 6/7, 7/7 or 7/8 would be faster still with no compelling reason not to use a rear wheel of that size.
I suppose you could try and find a scenario like a hill climb where the weight savings might give you an ever so slight edge, but I doubt a 7cm front and 6cm rear would be the fastest wheelset that day.
If it's calm enough to hold the deep front wheel, you should go for a deeper rim in the rear.
In this specific case you can't forget that the rims not only have a different depth, but also a different shape to account for the fact that the air is usually dirtier when it hits the rear wheel.
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