There are more factors than should be mentioned in this thread. Luckily, you don't have to precisely match wheel strength with a given application. Either you end up with a wheel that you keep until the braking surface wears to nothing, or you replace every couple years. Neither is the end of the world. I have an over-built front right now (32h Deep V) that I'm starting to get sick of, as it enters its 5th year of full-time training and racing.