ContinentalGrand Prix 4000 S II 700c Road Tire(Return to Product Page)

This is my first venture into full-carbon wheels. I was concerned about getting a tire that would fit the rim without undue force. I've had clinchers in the past that really live up to their name. I'm happy to report that the 700x25's fit with minimum effort. In addition, the tire came in at 205 grams for a total of 295 grams with AirComp tubes. This is lighter than my Vittoria sew-ups (305 grams). The 700x25's are a regal match for the 24mm wide Campy Bora One's - BikeTiresDirect.com current discount makes this a steal, Highly Recommended!!!

I rode the original GP4000S tires for 6 or 7 years before leaving them in search of something with a little better ride quality. After searching around a bit, I found that the Michelin Pro4sc is a better tire for my purposes. They are roughly equal in traction and handling, but the Pro4 has a more supple road feel and has more volume when comparing the 25mm versions. I also prefer the more subtle looks of the Pro4. What I gave up is a bit of longevity and an even larger bit of puncture resistance. Ive averaged 2-3 flats per year on the Pro4 (all in the rear,) where Id get one every 2-3 years on the GP4000s. Thats annoying, so I gave the new GP4000sII a try in both the 25 and 28mm sizes, hoping for the same puncture resistance I loved with, hopefully, a slightly improved ride quality. The decrease in comfort/ride quality moving from the Pro4 to the GP4000sII is definitely noticeable for me and Im willing to accept more flats for a better ride. For the rider who would rather error on the puncture resistance side of what is still an awesome handling race tire, the GP4000sII is outstanding. Worth noting is that the 25 measures a bit over 27mm on my slightly wide rims. The 28 measures a WHOPPING 31mm and is rather tall as well. It would not clear the seat stays on my Giant Defy Advanced frame, which has much more room than most frames. I have clearance for the width, but not the height. If you have tight clearance, take note. The Schwalbe One 28mm is just a touch smaller than the GP 28mm and the Pro4 25mm is only a little smaller than the One 28mm.

Just a note on this year's sizes. The 28mm version, on a rim that is 21.5mm outside

width (measured across braking surfaces) is 31mm wide.

The 25mm verson on a 20mm rim is 26mm wide.

I have been using a 28mm Conti 4 Season on the same rear rim, it measures 28mm wide.

So I think a 25mm GP4000 will be wide enough on back for my next order.

. . . But the tube didn't. Still scratching my head about that one. They do have a good feel to them, but ridiculous quality control issues. Also had trouble with a 4 season. Don't trust Conti's anymore.

Had the common sidewall bulge on the beloved GP 4000 I tires and decided to give Contis another try. First, I tried the 28 size on my Trek 5500 frame and miscalculated by about one billionth of a mm and had to exchange for 25mm. Also, tried the reflective wall version. A small increment, to be sure, but I believe the GP II tires may even be more smooth than the earlier incarnation. I believe it's true and it seems to roll just as well too. The reflective side wall is amazing. I do ride at night and sometimes in traffic. ANYTHING that makes me more visible at night is a good thing. When light hits these at night, they light up like a search light! Amazing. Increase your safety and get some, I respectfully suggest.

Exchange was easy and trouble free, btw.

I have been ride Conti's sine 1991. I have tried other brands just to see if I am missing something and always get the same answer. Great ride quality, long lasting and great for training and racing.

I bought a set of 4000 S's about 4 years ago and have logged about 4,000 miles. Very little wear, no signs of cracking and best of all NO FLATS!. These have been the best tires I have ever owned in about 20 years of cycling. I will be replacing them soon with a set of your 4000's II. It would be nice if these were made in a 26IN. tire size for I now own a LWB Recumbent also.

I've used the 4000 S II's since February '14, when I upgraded to new wheels (Fulcrum Racing 3's). Use has been road riding on variedhilly terrain, on less-than-perfect roads (lots of potholes, gravel, tar & chip, etc.), and crits & road races. With almost 5000 miles on them, they remain my tire of choice.

As a former expertpro motorcycle road-racer, I have very high expectations of tires. Grip (dry and wet) and predictable handling are what matters most, with reliability & puncture-resistance also important, light weight a consideration for racing, and tread life a nice benefit.

Tires are always a compromise. If you want ultimate grip on a dry road, forget about tread life and wet grip. If you want ultimate grip in the wet, forget about dry grip. If you want lightest weight, forget about durability & puncture-resistance. If you want best durability, forget about grip and weight...

For fast road riding and racing, the 4000 S II is the best mix of these traits that I've yet experienced in a bicycle tire. The grip, both dry and wet, is superb, and even when that level of grip is exceeded, they're smooth & predictable like a good racing tire must be. They're not the lightest racing tire, but close enough that it's not an issue for me. When I compare this tire to the lighter racing tires, this one delivers better all-around grip, better handling, and better durability, so the few grams I could shed with the others are simply not worth the trade-off.

The few negative reviews seem to me just users who had unrealistic expectations andor trouble that wasn't the fault of the tires. I had one flat all year. Other than maybe Gatorskins, I couldn't have done any better. These tires take a beating. Considering how much grip they offer, and the light weight, the durability is amazing.

They seem expensive considering they're just a bicycle tire, but the product quality is what I expect from a leading German company, and I figure I'm also paying for some R&D expense. I'm happy to pay it for tires this good.

I have been a GP4000 S customer for some time and I needed some new tires this summer and I liked the look of the new S II tires.

Currently I have 1640 miles on this set and there have been no issues in performance or ride comfort. actually the front tire still has some of the mold flash showing.

I have ridden on hard pack Dirt roads and some of the roughest country roads Virginia has to offer and had no problems.

I have ridden down some steep mountain roads at almost 50 MPH and had no vibration or instability. I may crash and burn tomorrow or have a flat tomorrow' but these tires are very satisfactory for all types of road riding!!

Durable and lightweight with phenominally low rolling resistance. Lacks a certain amount of road feel, though as Black Chilli evolves, that is improving. Go to for training and can be raced, though there are better racing tires.

I have run these tires and their Gaterback series on both of my bikes with flawless performance. I like the durability and handling they provide and BTD always has a deal going so i don't have to pay full retail.

I rode these 450 miles accross the Pyrenees in 6 days. No flats, great traction, always felt confident even on the fast descents.

I primarily used these on my race wheels. They feel fast and ride really smooth. The best part about these tires is that I think they are a perfect compromise between low rolling resistance and durability. There are tires that feel faster, but wear out quicker. I can usually get a whole season of racing and weekend riding out of these before the wear indicator gets too low. The only thing to note with these is that they run a tad big - I ride 23mm which is almost the size of some other companies' 25mm tires. They're more bulbous rather than wide. The only reason I found out is because I had 25mm of another brand on an aero bike with race fenders installed for the winter. When I switched to the Conti's, in 23mm, the fenders no longer fit!

Great tire, great rolling resistance and traction. Wears great and has amazing puncture proof technology. Highly recommended.

Great ride quality, very light but very, very weak (tissue paper like) sidewalls. Sidewalls such as this crush easily and lend themselves to pinch flats even under mild surfaces. Just two weeks after installing them this tire left me stranded 3 miles from work today. Not what I expect for such an expensive tire that claims to have flat protection tech. I've been commuting to work with Conti- Gatorskins wire beads for years and got only one flat in that time. I will attempt to return them to my LBS tomorrow. Hopefully the owner will swap them for some Gatorskins. Sorry Continental.

Did some research and bought these tires in the 2013-2014 winter off-season. Have used them for 1,900 road miles in 2014 (Connecticut) and no problems at all. I am not the lightest cyclist (200 pounds) but pump them up before every ride to 120 psi both front and back and have not had one issue all year, knock on wood. They seem extremely puncture resistant.

Good for all around riding good handling tire last a long time

I put 3092 miles between December 2013 and Aug 2014 on my first set of Conti GP4000s with only 1 puncture. I replaced that set with a second pair of Conti GP4000's and am confident I will get the same results.

I like riding on this tire, but after about 1200 miles of paved paths and public roads my LBS pointed out it's no longer safe to ride. The front tire casing weakened and is bulging all along the sides. My mechanic wouldn't put more than 60 PSI when he installed upgraded rims today. I now have to put something else on for a century this weekend.

Last year during in late June, I went from Gatorskins to 4000's (both wereare 23mm) and picked up at least a mile per hour in my average speed. After riding about a tenth of a mile I realized the ride felt better (I hadn't even been thinking about it and it just occurred to me).

I don't get the distance on them that others say they get, I usually get about 3,000M. Yesterday, I had a sidewall issue...I got a blowout. It was the first time I had any sidewall issue as others have described and I have gone through about 3 or 4.

Overall, I have been very pleased with these tires.