Looking for a racing clincher that won’t flatten out there.
2 choices:
Michelin ProRace2 - either 20mm front and 23mm rear or both 23mm
Vittoria Corsa Evo CX - same as above
Both with a high quality Latex tube (like the Michelin Aircomp Latex)
Both probably equal in speed with perhaps the Vittoria slightly faster with the Michelins better at puncture resistance.
I recommend the Vittoria’s for tris. If you do have to change a flat, they’re one of the easiest to work with. I can usually do it without levers.
-jens
If you want tires that won’t flat, get bontrager hardcases. I’m a student at uw-madison, so i ride the area around here a lot. I used to get tons of flat tires until i switched to these, and nothing since. Heck, i’ve got a few grand on them and they still show almost no signs of wear. Good luck out there.