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

I use this tire as my racing and training tire. Long lasting and extremely puncture resistant. It can handle more psi than advertised as well. I have this tire on all of my road bicycles.

I have recently switched to the Conti GP 4000 Sii 700x25 and I have nothing but good things to say about them. I had been riding Conti's GatorSkins 700x25 and thought that was an awesome tire, but the 4000 Sii is superior. I bought the GatorSkins because I wanted something durable with great flat protection and they certainly excel in those areas. I have had GatorSkins for 3 years and about 10,000 miles. Went through 2 tires on the rear and never did change the front and it was just now starting to get a bit of a flat spot. Also, only 1 flat over those 3 years. However about 6 months ago, I had to get a new rear rim because a spoke pulled out and I borrowed a rim from a LBS and it came with a GP 4000 S on the rim which I rode on for a few months with no issues or flats. My bike seemed faster and more comfortable, but I did not think it was the tire. But as soon as I switched the rear back to the GatorSkins I realized just how hard of a ride they are. I instantly felt slower and the ride was much harsher. I ordered the a pair of the 4000 Sii's right away. On my first ride, I could instantly feel the difference, the bike just seems to go! It almost seems effortless compared to the GatorSkins! Not only does it roll faster, it is a much smoother ride. I felt so much fresher at the end of a long ride due to the lack of road vibrations. Only time will tell if the 4000 Sii offers comparable mileage and flat protection to the GatorSkins, but many reviews and my 2 month loaner pointed to similar results. These are expensive tires, but they provide a ton of value by improving so many aspects of my riding, I feel it is money well spent!

So I just replaced these tires after 4,381.19 on the front and 4,362.36 on the rear. I took a rock hit and decided to preemptively replace them.

The 25mm is a super comfortable ride. Grips well in all conditions and offers a bit of extra comfort on rough roads. I weigh 165lbs and run 95psi.

I bought the 25mm Michelin Pro 4 Service Course to replace them (bought about 3,000 miles ago as I didn't think the Contis would last this long) and am already disheartened with the difference. I like the lack of tread pattern on the Michelin's (as Sheldon Brown says, there's no need for tread on a road tire), but their response and comfort is definitely less than the Conti's.

You really can't go wrong with these tires, especially if you can get them on sale.

Ride mostly on weekends. Roadie. 50 to 80 per ride. The grip when turning with the conti

4000 ll S handles very very well, and does not skid when applying brakes in an emergency. Totally recommend.

I love these tires. They are durable as hell and grip the road well too. They may not be the lightest tire, but come on now, can anyone really tell the difference? Get a set and try them out. All I use are Conti's on my bikes. Great tire.

I ride about 7000 miles a year and only want to use this tire after many others. It has great puncture resistance, rolls fast and can get lots of miles on them. I think that I am getting around 5,000 on the front and 4,000 on the rear conservatively. I urge all people that I ride with to get this one, it is worth the money.

These are my most recent tire experiments. I bought them in 700x25 sizing. Mounted on my 23mm rim, they measure about 28mm wide. Previous tires this year include Vittoria Rubino Pro III Slicks, Michelin Pro4 Service Course, Veloflex Open Corsa, and Vredestein Fortezza Senso All Weather.

Things I like

- They're durable and can take a beating but feel every bit as fast as slick tires

- Reflex material is a nice bonus on black tires - shine a line on them and they're very visible in the dark

- Comes in colors

- Comes in even wider 700x28 size (I don't know how wide these measure)

I don't hear much road noise when riding on these, and there's no buzz even when riding at higher pressures. I can see why people say this is probably the best tire you can get without putting in too much thought or fuss.

My only experience was with the previous GP4000S, and I was unfortunate enough to have suffered the poor sidewall problem. I've had the GP4000 SII for about 1,000 miles now in the last 3 months and they've done a superb job for all-around riding in California dry and wet conditions.

A testament to these tires taking a beating - I rode on a fully-deflated tire for 26-miles, stuffed only with leaves to get me to the finish line (stuck in the middle of nowhere at 8PM, no cellphone service, with no tubes left). The tire was worse for wear and had a lot of bruising, but there weren't any cuts or fraying, and my rear wheel was still fine despite that abuse.

I'm plenty happy with the 700x25 tire but would like to see just how the 700x28 tires fare.

After 1500 miles on the black and also on the version with a reflective strip, I am very happy with these tires. The current research supports the use of a 25mm tire with a slightly wider rim for better traction, slightly lower resistance, and better comfort.

These tires are sticky. So much so that if you are closely drafting another rider, his/her rear tire will pick up some road debris and throw your way.

The reflective strip tends to start getting unglued at the last 1/4 inch overlap, that the only issue I've experienced.

I have been using the Conti GP 4000 for 3 years. I average 3000 miles a year and change it twice a year, just as a precaution. I go out without worrying about punctures. I highly recommend these tires

Great tire overall. Has excellent traction and good ride quality. Recommend.

very stable down hill at speeds 40 miles per hour, cornered very well and rolled well also. I have used grand prix 4000 tries for 6 years now this new version is improvement on already excellent tire , conti all the way!

I love these until I start getting flats....then I get a new one.

Great tire in terms of reasonable weight, great wear, grip and puncture resistance. Always easy to mount and although list price is a tad high, most retailers offer them both in multiples at a reduced price.

Great tire in terms of reasonable weight, great wear, grip and puncture resistance. Always easy to mount and although list price is a tad high, most retailers offer them both in multiples at a reduced price.

I have used these for 5 years, no issues

Great tire for the money. I rode these tires hard for 1500 miles. Great performance and minimal flats. But once they're done, they're done. Just pulled the rear tire off this week as I had a slow leak in the tire. It was time to replace.

Easy to get on and handled really well in the rain

Used on a Trek Madone road bike which provides a softer feel but yet don't lose speed, in fact a faster tire at 28mm which has really been a pleasure to experience for an older rider. The cons are the tires softer ride doesn't withstand the hard longer miles another tire might hold a bit longer.

A friend recommended these tires to me and I've loved them. They have tiny marks in them for you to be aware of how much wear they've gone through and know when to replace. Didn't get the reflective kind but I think I will when shopping for new tires. Also rode in rain and they performed GREAT.

This a great tire. Rolls very well. Good training tire or racing tire. Very fast.