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Bruce wrote:
Darby,

Just reviewing the forum again and noticed your question about rotational mass.

Rotating mass is generally a bad thing, and here is why. Mass takes energy to move. The more mass, the more energy it takes to move. On a wheel, this mass to be concerned about is on the outside (the rim and spokes), so it is a large lever that you need to move, and you have a distinct disadvantage due to the mechanical properties of the drive train, ie, you are geared to have a single revolution of the crank rotate the wheel more than once.

Bruce

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Bruce thanks for clarifying the meaning of rotational weight. Either I understood it wrong or it was explained to me wrong. It was described to me as working like a flywheel. It takes more effort to get the mass moving but then inertia keeps it spinning with less effort.

Anyway, thanks Bruce for your enthusiasm for the Topolino wheels. It was the recommendations from this forum and a conversation with by Craig Calfee that persuaded me to buy my C19s. What I wanted was a wheel that would isolate as much road vibration as possible. My old steel frame Panasonic bike rides like a tractor. The ride was so harsh that I quit ridding it and it now collecting dust in my garage. It is headed for the trash as soon as I get my Calfee out the shop.

My only concern with the Topos is reliability. One of the mechanics at my bike shop told me to keep a backup set of wheels because the Topos will develop hub problems especially in the front wheel. I was actually considering selling my backup wheels which are an almost new set up Mavic CXP 33. However, based on some of the comments I have heard, I may want hang on to them.

Bruce

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