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Tire sidewall construction - GP3000 vs. ProRace(10 posts)

Tire sidewall construction - GP3000 vs. ProRaceFez
Jun 9, 2003 2:49 PM
Conti GP3000 black/black tire looks like the sidewall is a thin layer of black rubber over a browish skinwall or thread casing. That layer of rubber is so thin that it is very susceptible to cuts and scrapes and leaves whats underneath vulnerable.

Michelin ProRace black/grey looks like the tire sidewall is covered in a rubber similar to the actual tread. Looks more durable and more resistant to cuts and scrapes.

Is this difference why people complain the GP3000 gets cut too easily?
The fundamental difference between Conti and MichelinKerry
Jun 9, 2003 4:19 PM
Michelin sidewalls are 35% thicker than Conti (0.031 vs. 0.023 inches). Michelin tires are 15-20 gm heavier keep the tread at a reasonable thickness. You pays your money and you takes your chances. It must depend a lot on local riding conditions, as no one in our riding group has sidewall problems with Conti tires. My wife and I have got close to 50K miles on Conti GP3000 and Conti GP tires, and have yet to get a sidewall cut. As the tires get old, you do see some fraying of the sidewalls, but not failures. Maybe some people try a little harder to avoid gravel and road debris.
re: Tire sidewall construction - GP3000 vs. ProRacetarwheel
Jun 10, 2003 4:09 AM
I seldom get flats. But when I do, they often are because of sidewall cuts from hitting gravel during group rides when you can't see rocks and avoid them. However, I generally use Michelin tires and have no complaints. I've had one set of Conti GP3000s and they wore pretty good but seemed to square off in the back pretty quickly. One of the sidewalls also started fraying and thread got wound all over my wheel once. I would buy Contis again if they were less expensive than Michelins, but I usually stock up on Michis when I find them on sale. If I just had to have a tire with an unusual color combination, I would probably take another look at Contis since they come in so many colors, but I prefer basic black.
Similar experience for me as wellFez
Jun 10, 2003 4:52 AM
I also seldom get flats and I manage to avoid most rocks and gravel. Most good 700x23 tires last me 4,000 miles in the rear and thats from even tread wear and not sidewall cuts.

Although I have given ringing endorsements for Conti GP3000 in the past, my most recent set (800 miles) looks like it won't fare as well.

During my most recent cleaning, I have found a few surface cuts on the sidewalls that probably wouldn't have left any marks on other tires. I think this is mainly due to the very soft, thin, and sticky rubber layer that Conti uses on the sidewall.
re: Conti 4 seasons, perheps?cyclopathic
Jun 10, 2003 7:56 AM
Conti makes GP3000 in duraskin version (4-season) slightly higher rolling resistance, a few more bucks, no cuts.
Yeah, but thenFez
Jun 10, 2003 9:01 AM
I'd be riding a completely different tire.

I kind of stumbled on the GP3000 by accident and liked it for the great ride and low weight/low rolling resistance.

I just turned a blind eye to the delicate sidewall rubber.

I may go back to ProRace just because it seems to have characteristics closest to the Conti GP3000, but with better rubber construction on the sidewalls.
what do you mean?cyclopathic
Jun 10, 2003 10:05 AM
4-season is your Grand Prix 3000 with added kevlar layer to protect sidewalls and reduce flats.
4 season...Fez
Jun 10, 2003 10:53 AM
we may be splitting hairs, but my understanding is the 4 season also has a slightly different rubber compound on the tread to increase cold and wet grip.

is the difference big? i don't know since i haven't ridden them, but you did mention they are a tad bit heavier and exhibit increased rolling resistance.

My guess is the Michelin ProRace (which I have ridden) would perform and ride more like a GP3000 and give me increased sidewall durability than the 4-season (which I have NOT ridden) would.
re: Conti 4 seasons, perheps?longhorn
Jun 10, 2003 9:07 PM
I have a pair of the 4 seasons that have seen there fair share rough terrain and have held up beautifully. A great all around-er.
Another option, Victoria Rubino Pros..DINOSAUR
Jun 10, 2003 8:57 AM
I've ridden primarily Conti tires that past 5 seasons, mainly GP3000's. The GP3000's have mixed results for milage. My milage on the rear tires has gone as high as 2,000 miles to as low as 800 miles. For some reason the yellow GP3000's seem to last forever. Probably because they get so grungy looking.

Sidewall cuts are a concern where I ride as a lot of people have gravel driveways and the gravel spits out onto the roadway during the winter when riding conditions are at their worse. Broken glass is another hazard I'm always avoiding. I tried the Conti 4-Seasons and thought I'd found the perfect tire, then blew out a sidewall on the rear tire, and about two weeks later noticed a cut on the front sidewall and trashed it. I started using Victoria Rubino Pros. They use a harder rubber compound, ride a little harder than the Conti's and have beefier sidewalls. I have 1100 miles on the rear tire and it's just starting to square off and it's about halfway worn. No flats (knock on wood) The Rubino Pros run about $8-$9.00 less than the Conti GP3000's.

I've also used Michelin Hi Lite Prestiges and never had problems with sidewall cuts. They are priced low also, closeouts around $20.00. MY LBS does not stock them and I stopped ordering stuff from the internet in order to keep our Visa card under control (I'm out of control)..

But tires depend on a lot of different factors. I recently calibrated my floorpumps and both were off by 5 pounds (in both direction). Buying a hand held tire pressure gauge is a good idea, most floor pumps or not accurate and too high a psi will cause tires to wear out fast.