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Continental Grand Prix 4000 = Major Fail

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Continental Grand Prix 4000 = Major Fail

Old 05-31-09, 08:16 AM
  #26  
Nachoman
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Originally Posted by RichinPeoria View Post
GP4000>Ultra Race>Ultra Sport

My experience has been that GP4000s are much more comfortable than Ultra Race. I ride with 120psi in the rear on a aluminum frame. I have had many flats with Ultra Sports and none with Ultra Race or GP4000s.

For me GP4000s have been great tires.
The Ultra Race has been my favorite tire for years. But I never see them on sale anymore.
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Old 05-31-09, 08:20 AM
  #27  
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I've had GP4000S w/Chili for about 400 miles now. I find them very comfortable, stable, and haven't had a flat. 700x23, I run 100psi front, 110psi rear, 172 pound rider.
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Old 05-31-09, 08:30 AM
  #28  
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Originally Posted by Nachoman View Post
The Ultra Race has been my favorite tire for years. But I never see them on sale anymore.
www.mec.ca carries them, but I am unsure if they will ship all items to the USA. There might be export laws surrounding tires?
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Old 05-31-09, 10:00 AM
  #29  
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Originally Posted by khatfull View Post
I've had GP4000S w/Chili for about 400 miles now. I find them very comfortable, stable, and haven't had a flat. 700x23, I run 100psi front, 110psi rear, 172 pound rider.
wow.. i weigh 50 lbs less than you and run the same pressure... im paranoid about flats...
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Old 05-31-09, 10:06 AM
  #30  
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Originally Posted by Val23708 View Post
wow.. i weigh 50 lbs less than you and run the same pressure... im paranoid about flats...
I weigh 200 and run 120 rear on my PR2's with no problems. You might want to go up some.
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Old 05-31-09, 10:45 AM
  #31  
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Originally Posted by kwrides View Post
I weigh 200 and run 120 rear on my PR2's with no problems. You might want to go up some.
Lighter riders can run less pressure, and that's more comfy. There is absolutely no advantage (and several significant dis-advantages to running too high a pressure). I'm 170, and run 100 front, 110 rear, and have never had a pinch flat.

Sounds like the OP just had bad luck- whatever cut the sidewall probably would have had the same effect on whatever tire he was running. FWIW, I've had great luck with the GP4000 tires, except for the two I slashed hitting something sharp in the rain.
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Old 05-31-09, 12:00 PM
  #32  
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I've used GP4000's for the past several years. I try other tires, but always go back. They're a nice balance of supple ride, excellent grip and durability.

Of the 6-7 I've gone through, I only had to replace one prematurely because of a casing tear, and that was from some nasty sharp metal thing in the road.

250+lb rider, 110psi.
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Old 05-31-09, 12:03 PM
  #33  
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Originally Posted by paste_me View Post
I bought my first pair of these tires after hearing wonderful things from everyone. I had a friend who rode his for over 6K miles.

I have ridden mine for less than 200 miles and started having flats, I didn't pay much attention to it after the first time but it has happened twice since. I took the tire and examined it closely and realized that there was a tear in the side wall. I am very satisfied, I would have expected these tires to beable to take more abuse.

Has anyone experienced this with these tires? And are there any other tire recommendations?
They're tires. Unfortunately there's no way to know if it's a quality issue or if you were just unlucky.

Perhaps trying another GP4000--or, better yet, calling whoever you bought it from and seeing if they'd be willing to replace it--before starting a thread on the internet entitled "GP4000 = Major Fail" might be a good idea.

I have about 4K on mine and they're still going strong.
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Old 05-31-09, 12:18 PM
  #34  
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Try 25s, or the GP All season. Has the special layer to protect the sidewall.
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Old 05-31-09, 12:29 PM
  #35  
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Continental GP4000s tires, 1,500 miles this season, one flat two weeks ago, 1/8 inch piece of glass. New tube and a patch on the inside of the tire, still going strong.
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Old 05-31-09, 01:19 PM
  #36  
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It's the vagaries of the poisson distribution, regarding flats.

Sounds like the OP might have had an unusual issue either with a bum tire or trauma to his sidewall.

I have been using these tires (GP4000S) the past 2 years with very little complaints. Maybe one flat every 3000 miles.

BTW If you EVER get a non-pinch flat, remember to remove the tire completely, turn it inside out, and find the culprit...otherwise you are seriously risking a repeat flat. You can find the area of concern by "matching up" the hole from the tube with the tire.
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Old 05-31-09, 02:41 PM
  #37  
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I dug out three tiny glass pieces from small cuts in my GP 4000S front tire in 800 miles. They were buried inside the cut, but hadn't gone through the belt yet, so no flats. Otherwise the tires are great.

I only had a pinch flat from ramming a deep pothole, a thin wire poked through the tire, and a roofing nail straight through the tire (at night) in 10,000 miles on a series of Michelin Krylions. Lots of small cuts, but no others went through. I do try to ride in the car wheel tracks on roads as much as possible, to avoid the debris at the side of the road. There seems to be much less glass on the road in Ohio these days.
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Old 05-31-09, 02:57 PM
  #38  
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I have been using 4000's for a few years now with great success. I get about 4k miles on the rear and 8k on the front. I have had 2 flats on all of my pairs. 1 was a piece of metal shaving that pierced right through. The second was a huge pothole that I was just glad my rim wasnt destroyed. I had a cut in the sidewall of my last rear tire. I hit a rock in a corner and it chewed up the sidewall and blistered it out a bit. I kept a close eye on it and ran them for 2k miles after it happened until the tire wore out.

The OP probably had something similar happen. Sidewalls are thin and not equipped to handle slashing blows like that. Keep rolling them. They are a great all around tire.
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Old 05-31-09, 03:20 PM
  #39  
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Originally Posted by paste_me View Post
I bought my first pair of these tires after hearing wonderful things from everyone. I had a friend who rode his for over 6K miles.

I have ridden mine for less than 200 miles and started having flats, I didn't pay much attention to it after the first time but it has happened twice since. I took the tire and examined it closely and realized that there was a tear in the side wall. I am very satisfied, I would have expected these tires to beable to take more abuse.

Has anyone experienced this with these tires? And are there any other tire recommendations?
I only have about 50,000 miles on Contis GP3000/4000s over the past four years. So far, so good.
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Old 05-31-09, 03:25 PM
  #40  
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I have ~2,000 miles on my GP4000S, rode them all through winter, plenty of rainy miles.

1 flat.

They do cut up easily though and as a rule I'd take my Vredestein Fortezza TRicomps over them but for the price I paid ($25 from PBK) they've been solid performers.
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Old 05-31-09, 06:58 PM
  #41  
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I got 3,657 miles with zero flats on my last black Conti 4000 rear tire before replacing. It probably would have made it to 4,000 miles, but I put a new tire on for last fall's Lotoja race. That is significantly more miles than I get out of most rear tires.

Last edited by Skewer; 05-31-09 at 07:03 PM.
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Old 05-31-09, 08:44 PM
  #42  
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I have the 4000's on my tandem. On one ride I got a snake bit puncture, my fault. On the ride back the rear blew out. I had to purchase a rim due to the cause of the blow out. Was it the rim or tire fault, I do not know. I have not had an issue for over 500 miles now. Still using 4000's. I had 6 flat tire before that last tandem ride with two different bikes, clinchers and tubulars, and several different brands. I think I just had bad luck and now that bad luck has moved on to someone else.
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Old 05-31-09, 08:46 PM
  #43  
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I've had GP3000's and GP4000's over the past 5 years on 2 different and I really like them. I would think that any tire is subject to sidewall damage. I ran over a rock once and it nicked the sidewall enough to cut completely through. That behavior isn't peculiar to Continental, in my opinion...
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