I asked in the Clyde forum, because there's a lot of inertia in there ... but I'd like a second opinion from the 41. Have you ever had any trouble, or come close to it, from your rims heating up during a descent?

I'm going to be getting a new set of wheels in the next few weeks, and narrowing down which ones. They'll almost certainly be carbon rim tubulars. I realize these have less trouble with heat than clinchers, but I'm about 200 lbs ( and 6'1", not just a tub of lard! ) and I like taking my bike into the mountains for long climbs. What goes up must come down. It's rare to see grades steeper than around 10 % for very long out there. Hurricane Ridge is 5,240 feet of elevation over 17 miles. Within the city, the worst they'll deal with is about 1/2 to 2/3 miles at 19 %, with cross streets that traffic could come out of, so I ride the brakes coming down this one. But I don't do it often - there are other placed I prefer to ride.

Should heat dissipation be a reason for me to prefer one wheel set over another?