Long term: Veloflex Vlaanderen Tubular 700 X 27C
See my review of the Veloflex Vlaanderen Tubular Tire as well as other blog posts on it.
I’ve grown to adore the Veloflex Vlaanderen: ride quality and handling are unmatched by any other tire in the line, and then there is durability.
My 55cm Vamoots RSL will not allow the Veloflex Vlaanderen on the rear (clearance is at its least with the 55cm frame size), so I use Veloflex Roubaix or Veloflex Sprinter on the rear mainly.
Durability
I glued on the Veloflex Vlaanderen onto a front Lightweight Obermayer way back in June, riding it almost exclusively. It shows mild wear but here in late September it has performed like a champ and never needed replacement. Yet I’ve run over plenty of glass and other nasty stuff. And its ride quality and handling are unbeatable.
Either I’ve been exceptionally lucky (unprecedented in 9 years or so), or the Vlaanderen has an unusual ability to shrug off materials that would normally puncture a tire. Perhaps because of its volume and running it at 100 PSI vs my usual 120 PSI for a front tire it shrugs off punctures better?
There was one slow pinhole leak (probably a tiny wire), but Stan’s No Tubes sealed that up and it never troubled me again. I love this tire. It is now my #1 choice for a front tire. If I could run it on the rear, I would.
UPDATE 08 Nov 2015: the Vlaanderen is still going strong. Amazing!