Continental Grand Prix 4000 vs. Conti All-Season - Page 2

Ken, I'm looking forward to trying the 4000s next time based on your findings. Can't believe the ride is much better than the 3000s, which to me is already great.

Note, I don't run the max rated pressure. The 3000s carry a max rating of 120 psi, and a recommended rating of 110 on the package. At 180 lbs (82 kg), have found 100 F/105R works best. At your weight, believe you'll find lower rolling resistance, better ride, and better grip, plus fewer cuts and punctures at pressures of around 100 psi.

I have a race tomorrow.
I'll go with 100f, 105r, on the Felt, and let you know how it goes.

__________________
Cheers,
George.

I use GP4000s and I'm around the 80 kg mark as well and I noticed a big difference in comfort when I dropped the rear pressure to 110 rear and 100 front

Hey Ken,

I went for it and got my set of Conti 4000's. I noticed when they first came out the cost was around $62. I picked them up last week and I paid $49 so I'm pretty happy about that. Do you have any idea what the TPI is on these? I have not been able to find that. I probably will put these on within the next two weeks. I'm going to finish off with a couple more rides on my Bontrager Race X Lites, which I think are also made my Continental. I report back after about 5-700 hundred miles with what I think of them. Can't wait!

Hey Oscar

I don't know the TPI on the GP 4000's,
I had my first experience that the vectran layer works. Ran over some glass the other day and a shard pierced the rear tire, I could hear it grating as I rolled along, but being dark I could'nt see it.
Anyway when I got home 20k later I just pulled it out of the tread and everything was fine, all through the ride I was expecting it to eventually
pierce the tube but it didn't get through at all, even with the load on the tire.

So I'm even more impressed with the tire,

Regards
Ken

I looked on the web page for TPI, not yet published: http://www.conti-tyres.co.uk/conticy...x%204000.shtml

On pressures,
for comfort, 85 front, 100 rear,
for Tri use, 100 front, 105 rear is sufficient for me, keeping in mind both bikes are fitted with flat bars, not drop or aero. If I could find a super smooth surface, I would try a slightly higher pressure.

__________________
Cheers,
George.

From what I can make out from their German 2006 catalog at:
http://www.conti-online.com/generato...eifen06_de.pdf

It looks like they have the same nominal advertised casing TPI (independent of the extra breaker belts) as the GP 4-Season and Attack/Force.

GP4000 - 3/330 (3 Lagen/total 330tpi* + Vectran Breaker)
GP 4-Season 3/330 (3 Lagen/total 330tpi* + Nylon Double Breaker + DuraSkin)
(e.g. 110 tpi fabric)
*tpi siehe Seite 54