I owned Zipp 303's, save your money. I dumped them on Ebay. Nothing wrong with them except that they are slow. I don't care how cool the decals are. We did alot of testing, compared to a H3 or even a DA 7700 they were much slower. Advertising does not make for a fast wheel! When was the last time you saw Postal with a Zipp 303 front wheel. The ceramic bearing thing is also a myth. I am an ex f14 pilot and an enginneer from USNA. Ceramic bearings were meant for the Tf-30 engine in my Tomcat turning at 30000+ RPM. They don't make much difference at 95 RPM. I cannot remember the last time the my wheel bearings got to 800 degrees celcius which is what ceramic was designed for.