I have a set of Bontrager Aeolus clincher wheels. The Aeolus 7 front and Aeolus 9 rear, both have Ceramic Speed bearings in them...including the cassette body. Wheels come with Zipp Tangente Speed tires (23mm front, 25mm rear) with no more than 112 miles on them. The Aeolus 9 front has 20 miles on it. The Aeolus 7 wheel has 4 IMs and 2 70.3s, and the Aeolus 9 wheel has 2 IMs.