Quote:
Originally Posted by Mark McM
I've also noticed that among aluminum rims, the deeper the rim the less likely it is to go out of true. Which is probably not surprising, as increasing the depth of a rim increases its strength and stiffness (out of proportion with its weight).
I've got several sets of 30+ mm deep aluminum rims that have never had to be trued after many years of hard use. Carbon rims tend to be deeper than aluminum rims, so I wonder if robustness is more closely tied to depth or material.
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We're both engineers so we probably notice the same things
I've not had deep section aluminum rims so no data, but yes, as a rim cross section gets a higher moment of inertia it's got to be stiffer, just like larger diameter (or cross section) frame tubes.
My deepest carbon rim however is 35mm. On Martha's Vineyard and at 140 pounds getting blown around matters to me more than the other aspects.