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We've seen few product introductions cause such seismic interest as the release of the Conti GP4000 clincher tire. Its billing was mind-boggling, but its performance backed it up: With the GP4000 you get the suppleness and grip of the vaunted GP3000, but with longer tread wear, greater puncture resistance, and an overall lighter weight thanks to the GP4000's use of Vectran. It earned such popularity, in fact, that Conti chose to release it as a tubular for those of us who can't get enough of the sweet ride of sew-ups.

The GP4000 tubular a whole lot more than just a stick-on version of the clincher: It offers Conti's brand new "Black Chili" rubber compound. Conti first developed this for the Moto GP crotch rocket circuit, and they've brought it over to their top-end bike tires. Super-tiny carbon black particles are incorporated into the rubber formula to provide benefits along three lines:

1. The tiny size of the "Black Chili" particles allows them to mold to the road surface more readily. It gives the tire greater ability to conform to imperfections in the road surface. Better contact with the road means better grip in demanding situations such as high speed cornering.

2. Since the "Black Chili" particles are so small, more particles fit into the contact patch of the tire -- reducing tire wear and increasing tire longevity.

3. The "Black Chili" particles are literally more flexible, which reduces the rolling resistance of the GP4000 tubular.

The GP4000 tubular has a 240tpi casing and a dynamic siped tread pattern, with the same Vectran layer sandwiched between the tube and the tread you get in the clincher version. Available in 700x22. Black only.

The actual weight of the Grand Prix 4000 Tubular Tire is 250g.

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Continental Grand Prix 4000 Tire - Tubular

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Here's what others have to say...

2 5

Too Tough to Mount

  • Familiarity: I returned this product before using it

I preface this review as I always do, this is only my opinion and not objective fact.
Also, I worked in a shop for 2 years & have wrenched on my own bikes for 20+ years.
I am in my second full season of tubulars and, after two sets of Vittoria Corsa Evo Cx, I researched alternatives. I really really liked the Vittorias but wanted to try something different. 2 of my top 3 choices were out of stock (Veloflex Carbons & the Vittorias) so I went with the Conti GP4000s. This would be my first experience gluing up tubis on my own so I researched, asked advice & watched videos. I followed the Conti directions to the letter...I even stretched the tire on the rim for a whopping 72 hours! After gluing up the rim and tire properly, I was ready to mount. OR maybe not! What was slightly difficult to mount dry for stretching purposes was now next to impossible glued. Still, I did it! However, all the pressure I used to mount it resulted in multiple spots where the tube was compromised, resulting in several constrictions (much like a balloon animal looks like after the twisting has been untwisted). I called Comp Cyclist and even after I explained that my force mounting the tire seemed to cause the problem, I was told I must have had a bad tire and they were happy to issue a RMA so I could return it. The Vittorias were back in stock so I decided to return both. Long story short, the Vittorias went on smooth, easy & predictably.
I have heard nothing but good things about these tires (usually the clinchers) & I obviously did not ride them AND I recognize, despite following the directions EXACTLY, many of you would proclaim this is my error. Still, the seemingly universal conclusion that these are so difficult to mount required I feel I need to ding them some on my rating. If I could abstain from a rating, I would & AGAIN, MY rating is for me and based solely on the difficulty to mount, issues upon mounting (compared to EASE of mounting Vittorias). May work for some but not for me.

5 5


  • Familiarity: I've put it through the wringer

The GP4000 tubular is simply an excellent tire and worth the cost of admission. I ride tubulars all year, touring, and amateur racing. Good and bad roads...good and bad weather. Having tried conti's competitions and Vitorias on zipp 303s, these came out clear winners. The grip and ride quality is excellent. I ride them at 100-105psi and get a nice smooth feel for the road and no sense of resistance. They are bullet proof as conti's are known for. 1 slow leak from a large pebble in 2500 miles on every type of road surface.
The benefit to the vulcanized construction is a perfectly round tire and smooth base for perfect mounting everytime. Yes, conti's fit tight. Stretch it for three days as they recommend and mount with no air in it, goes right on, add a little air, easy to get straight because of the smooth round shape.
Complaints about not being able to repair them only apply to those who actually take the time to open and repair tubular tires. As these have been bullet proof it hasn't been an issue.
My only wish is a 24 or 25 size to run in the rear.

Responded on

How big are you and how many miles do you get on them? I'm about 190lbs, and would like to find something between the measly 800 very enjoyable miles I got from Conti Sprinter Gatorskin, and the agricultural 3,600 miles I got from Tufo S33 Special.

5 5

Great Tire

  • Familiarity: I've put it through the wringer

They are a bit pricey and though they were a bear to mount the tight fit add's a little confidence that they aren't going to roll off even if not perfectly glue'd. Running at conti's recomended inflation pressure can be like riding on a jackhammer but they roll increadibly fast. Dropped the pressure slightly from the recomended and have a nice blend of ride and fast rolling tire. My only complaint is the price, for a training and racing tire its about 2x what I want to spend which has me looking at conti's other offerings namely the sprinter.

5 5


  • Gender: Male
  • Familiarity: I've put it through the wringer

Second set of these bad boys. This is no question my favorite biking tires. Only con is they are on the high side. Good ride quality, okay tread wear.


is this a tubeless tire?

is this a tubeless tire?

Responded on

These are Tubular tires that mount to Tubular wheelsets only. If you have a clincher wheelset you will need a clincher tire. If you have one the new "Road Tubeless" wheelset you can use a Clincher with a Tube or a "Road Tubeless" tire. Very few true "Road Tubeless" tires exist yet, the most popular thus far is the Hutchinson Fusion 2 road tubeless.

2 5

Great Tire. Too Bad They Don't Fit

These are great tires. They ride well, corner great, and wear adequately. But I doubt I will ever buy another one. Conti tubular tires are sized just enough too small that they are next to impossible to mount. And I have mounted a lot of tires in my life. I had hoped the 4000 would be sized better, but no. Even after stretching them for a week at 140 pounds pressure they still fight you to a standstill when you try to mount them. I'm sticking to my Vittorias for tubies and Continentals for clinchers.I guess you could pay someone to mount them for you--but I am somewhat anal about knowing my tires are mounted correctly.

Responded on

Write your comment here...I never had any trouble mounting them on zipp 202's. I stretched them over night and viola, no trouble.

Responded on

Seems to me that Conti's are always fit tight, whether tubulars or clinchers. I've stretched Conti tubulars for days and still had a major thumb workout when doing final mounting. They are definitely a tighter fit than other brands. But, I've concluded that they're worth the extra effort. They seem to be consistently well-made and a good general purpose tire, durable enough for training and fast enough for racing.

5 5

The Best

These are not training tires. They cost a ton and wear out quick but that's because they corner tight and stick to the road like an F1 tire. Perfect for racing wheels.