It wasn't until the GP4000S came out tested well on the Bike Tech Review test -- and after lots of people started talking about them -- that I finally tired one (yep, only one). I decided they were ok enough to use as rear training tyres (jee, how generous of me), then, after using them for a while, I eventually started sometimes using them as rear race tyres. Now I also occasionally use a Four Season or Gator as a rear on my wet day bike.

As others have said, the GP4000S is a very good all-round tyre, without being super-fast.

So which tyre is the fastest?

So which tyre is the fastest?

In clincher, Veloflex Record, Conti Supersonic, Vittoria Pista... maybe the Ultremo ZLX. All of these are short lived and rather fragile.

So the fastest usable tyre is GP4000S. Some say the new Force/Attack is even faster but I haven't tried. Maybe sombody knows?

The Pro3 and GP4000s are about equal if you trade off their strengths.

The Pro3 rides a fair bit nicer compared to the GP4000s (which feels kinda 'dead' and 'wooden' if pumped over 105psi for a 23c tyre). The GP4000s is less prone to cuts (though the Pro3 is no where as vulnerable as the Corsa Evo's nor the Veloflex Records or GP Supersonics. )

Their differences are about equal and level of each other. So it will really depend on which is your priority.

Haven't had the chance to try the Pro4 yet so cannot comment on that.

Some say the new Force/Attack is even faster but I haven't tried.

I've got some pro4 endurance tires coming in the mail (in a 25mm) for the winter. Can't wait to try the new profile.

Then will probably go with some vittoria evo's as the season gets under way.

How much do you weigh 53by11? Just so i have a reference of where to start when I play with the pressures (i'm ~185lb).