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  1. #1
    Senior Member Big Pete 1982's Avatar
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    So much for my experiment with Continental GP 4000's.....

    So I was in dire need of new tires. Front and rear had chunks of rubber missing. So I decided to go all fancy high dollar and get some Continental GP 4000's at about $75 a tire. Everyone rants and raves about the endless awesomeness of these tires. And I will admit, they ride like butter! But I've had 3 flats since putting them on in the last 2 weeks. 2 rear and one front. One was a tiny little thorn! On my old Bontrager kevlar tires I never had a single flat in like 3000 miles and I rode over all kinds of rocks, broken glass, thorns etc. I hate to do it since they are still pretty much brand new, but I've got to switch these out. I can't deal with that many flats. I think I will try the Gatorskins next.

  2. #2
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    Probikekit.com. They are half that price with free shipping and no tax.
    You're just trying to start an argument to show how smart you are.

  3. #3
    Senior Member TJClay's Avatar
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    I haven't got any more flat on GP4000s then any other tire
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  4. #4
    Travelling hopefully chasm54's Avatar
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    They are terrific tyres, but they're a racing tyre. Despite their "vectran" layer, If you want really good flat protection, you have to have something heavier than about 200 grams.

    Feel free to donate me your nearly new GP 4000s, I can find a good home for them.
    Last edited by chasm54; 06-15-13 at 03:49 AM.
    There have been many days when I haven't felt like riding, but there has never been a day when I was sorry I rode.

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    Put mt first ride of any length on a set of GP4Seasons this morning. Same tread as the GP4000, slightly more puncture protection, not as stiff a sidewall as the Gatorskin. It's too soon to say anything, but, I rode over plenty of stuff this morning. The other tires I've had good luck with are Michelin Pro Optimums and Maxxis Re-fuses. I hated Vittoria Rubino Pro's.
    Birth Certificate, Passport, Marriage License Driver's License and Residency Permit all say I'm a Fred. I guess there's no denying it.

  6. #6
    2 Fat 2 Furious contango's Avatar
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    Quote Originally Posted by Big Pete 1982 View Post
    So I was in dire need of new tires. Front and rear had chunks of rubber missing. So I decided to go all fancy high dollar and get some Continental GP 4000's at about $75 a tire. Everyone rants and raves about the endless awesomeness of these tires. And I will admit, they ride like butter! But I've had 3 flats since putting them on in the last 2 weeks. 2 rear and one front. One was a tiny little thorn! On my old Bontrager kevlar tires I never had a single flat in like 3000 miles and I rode over all kinds of rocks, broken glass, thorns etc. I hate to do it since they are still pretty much brand new, but I've got to switch these out. I can't deal with that many flats. I think I will try the Gatorskins next.
    I've been very pleased with Schwalbe Durano Plus. Not as heavy as the Marathons but still provide puncture protection. Done several hundred miles on my Duranos and no incidents as yet.

    I ran Marathon Plus tyres for about 5000 miles before deciding I wanted something lighter and faster (it was the speed of some kind of Continental GP tyre that persuaded me, although I trashed a new Continental in less than 15 miles with a split sidewall). So I tried another kind of tyre and got a flat in the first mile, and then I decided I'd rather haul the weight of a plastic sleeve than haul the weight of dozens of spare tubes and patches.
    "For a list of ways technology has failed to improve quality of life, press three"

  7. #7
    Bicycle Commuter Bluish Green's Avatar
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    Changing a flat or two can cancel out all of the speed gains between faster tires and puncture-resistant tires. I ride city streets with plentiful potholes, glass, rocks, etc., so Kevlar-reinforced tires are pretty much a must for me. Plus, the extra rolling resistance keeps me in better shape.

  8. #8
    Cat 5 field stuffer bbeasley's Avatar
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    Big Pete,

    How much do you weigh, what size are the tires, what pressure do you run? I'm running GP 4000s 23s and I weigh 193. I got a couple of rear flats and went up from 110 to 120 on the rear. No flats since but of course it could just be good flat tire luck? I've got 976 miles on my tires and those two flats are it.

  9. #9
    Senior Member Big Pete 1982's Avatar
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    Well, I got some brand new Gatorskins on the bike today. Went for a test ride. Broke a rear spoke.

    bbeasley - I currently weigh about 245 lbs at 6'7. 700/23 tires both at 110 psi. I've pulled thorns out of the last few flats. Tiny little things that have no business puncturing a tire. I think the GP4000's ride great, but I don't trust them to keep me from getting a flat. My old Bontrager tank treads would have scoffed at those puny little thorns!

    I may need to look into getting new wheels. Well, at least a rear. I've broken a few spokes in the last year and a half. Currently riding Mavic Aksium 20 spoke front and rear. It seems like I've had almost no issues for 1000's of miles and now every ride I'm having problems!

  10. #10
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    Quote Originally Posted by Big Pete 1982 View Post
    It seems like I've had almost no issues for 1000's of miles and now every ride I'm having problems!
    Been there, done that.

    My Open Pro rear went thousands. Then it became an everyother ride issue. Fresh rim and spokes on my 36h hub restored my riding consistancy. Once spokes on a wheel are fatigued it seems as though you can expect ongoing issues.

    110psi in a 23mm at 245 lbs sounds like too little pressure. I'm running 8bar (116psi) in 28mm tires at 116kg (255lb). If I were running 23's I would expect to be pumping them up to around 130-135psi.
    Birth Certificate, Passport, Marriage License Driver's License and Residency Permit all say I'm a Fred. I guess there's no denying it.

  11. #11
    Senior Member IBOHUNT's Avatar
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    My Gatorskins killed a Ford truck that pulled out in front of me last Saturday.
    They faired better than my shoulder...

  12. #12
    Travelling hopefully chasm54's Avatar
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    Quote Originally Posted by IBOHUNT View Post
    My Gatorskins killed a Ford truck that pulled out in front of me last Saturday.
    They faired better than my shoulder...
    Really? Separation? I know how that feels, bad luck.
    There have been many days when I haven't felt like riding, but there has never been a day when I was sorry I rode.

  13. #13
    Banned. Mr. Beanz's Avatar
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    Could just be suck luck! I can go months without a flat then get 2 or 3 within a week.

    Now paying $75, that sucks! That would bother me more than the flats.

  14. #14
    SuperGimp TrojanHorse's Avatar
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    Quote Originally Posted by Mr. Beanz View Post
    Could just be suck luck! I can go months without a flat then get 2 or 3 within a week.

    Now paying $75, that sucks! That would bother me more than the flats.
    I hear you. I can go months without a flat (particularly when I'm not riding, ha ha) and then bam bam bam.

    I'm leaving the GP4000S love train though. I used to really like my Michelin Pro3 Service Course tires but I'd cut 'em up and have to retire them early... the GP4000S have been not even a little bit better, so my most recent PBK purchase was some spare Pro4 Service Course. They are supposed to be superior to the Pro3 and they're cheaper than the Contis. The contis do have a nice ride though, no complaints there.

    If you really hate flats and don't mind riding on wagon wheels, stick 28mm gatorskins on your bike with mr tuffy liners. You'll probably never flat. I know a guy who does exactly that, and he's a stronger rider than I am so I have to respect his opinion.

  15. #15
    Banned. Mr. Beanz's Avatar
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    Quote Originally Posted by TrojanHorse View Post
    If you really hate flats and don't mind riding on wagon wheels, stick 28mm gatorskins on your bike with mr tuffy liners. You'll probably never flat. I know a guy who does exactly that, and he's a stronger rider than I am so I have to respect his opinion.
    I hate tuffy liners! Maybe because of my weight, but the edges cut into my tubes. I've tried all types of fixes, filing edges, tape over edges, overlap this way that way blah blah blah but they still cut. The tandem also!

    Some members argue in other threads that it is installer's error. I;ve had shops install them, I;ve installed them and still...

    You can google search the tuffy cut problem and find posts/threads. Even the tuffy website in Q&A section, they are asked about the problem and they say it happened with older model tuffy strips but it "COULD" happen to current models. But I have had lighter partners have zero problems with tuffy.

    Back in 05 I did 5,000 miles on my roadie with ZERO flats (lots of mountain roads rides) riding an old school 25 Armadillo but those suckers are heavy!

  16. #16
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    Quote Originally Posted by TrojanHorse View Post
    I hear you. I can go months without a flat (particularly when I'm not riding, ha ha) and then bam bam bam.

    I'm leaving the GP4000S love train though. I used to really like my Michelin Pro3 Service Course tires but I'd cut 'em up and have to retire them early... the GP4000S have been not even a little bit better, so my most recent PBK purchase was some spare Pro4 Service Course. They are supposed to be superior to the Pro3 and they're cheaper than the Contis. The contis do have a nice ride though, no complaints there.

    If you really hate flats and don't mind riding on wagon wheels, stick 28mm gatorskins on your bike with mr tuffy liners. You'll probably never flat. I know a guy who does exactly that, and he's a stronger rider than I am so I have to respect his opinion.
    Personally, I think liners with Gatorskins is overkill. I'm not the lightest guy around and I've never, ever flatted with my Gatorskins, which now have more than 2,000 miles on them. I've also found Gatorskins to get far more mileage than some other alternatives I've tried, like Maxxis ReFuse or Bontrager Hard Case. Not saying they're bad tires, but I could never get either to last more than about 1,500 miles.

  17. #17
    SuperGimp TrojanHorse's Avatar
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    Alright, I did say if you "really, really hate flats"...

    Back when I was a young whipper snapper and before the internet, I commuted on my old bianchi road bike (it was new at the time) about 16 miles each way. Flats when you're on the way to work are just flat out demoralizing and Mr Tuffy fixed those 100%. I have no idea what awful cheap tires I was using at the time.

    Fast forward to now and I'm not willing to sacrifice my lovely ride quality for lack of flats. I periodically have them but my main gripe is chucking tires with less than 1000 miles on them.

  18. #18
    Senior Member Big Pete 1982's Avatar
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    Quote Originally Posted by bigfred View Post
    Been there, done that.

    My Open Pro rear went thousands. Then it became an everyother ride issue. Fresh rim and spokes on my 36h hub restored my riding consistancy. Once spokes on a wheel are fatigued it seems as though you can expect ongoing issues.

    110psi in a 23mm at 245 lbs sounds like too little pressure. I'm running 8bar (116psi) in 28mm tires at 116kg (255lb). If I were running 23's I would expect to be pumping them up to around 130-135psi.
    Holy crap! Is 135 psi even possible? Aren't most tubes maxed out at 120?

  19. #19
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    135 is easy with any decent floor pump. Tubes don't have a max rated pressure, tires do. A tire's max rated pressure is inversely proportional to it's cross sectional area. The narrower the tire, the smaller it's cross sectional area, the higher the pressure it can contain without risk of blowing it's beads off the rim.

    In the case of tubulars you no longer have to concern yourself with the beads ability to hold onto the rim since the tire is sewn shut and glued onto the concave surface of the rim. Subsequently thay can and are pump to even higher pressures. It's not unheard of for track races to pump their tubulars close to 200 psi. (even with the lightest of latex tubes)

    Big guys require either high pressure in the smallest tires or larger tires at less pressure. Max recommended pressures are there for a reason, but, I wouldn't hesitate to exceed the indicated max by as much as 10%. At my weight I would anticipate running 23's at 130-135, 25's at 120-125 and 28's at approx. 110-115. Other's mileage with regard to pressures and puncture resistance may very well vary.
    Birth Certificate, Passport, Marriage License Driver's License and Residency Permit all say I'm a Fred. I guess there's no denying it.

  20. #20
    Cat 5 field stuffer bbeasley's Avatar
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    Quote Originally Posted by bigfred View Post
    135 is easy with any decent floor pump. Tubes don't have a max rated pressure, tires do. A tire's max rated pressure is inversely proportional to it's cross sectional area. The narrower the tire, the smaller it's cross sectional area, the higher the pressure it can contain without risk of blowing it's beads off the rim.

    In the case of tubulars you no longer have to concern yourself with the beads ability to hold onto the rim since the tire is sewn shut and glued onto the concave surface of the rim. Subsequently thay can and are pump to even higher pressures. It's not unheard of for track races to pump their tubulars close to 200 psi. (even with the lightest of latex tubes)

    Big guys require either high pressure in the smallest tires or larger tires at less pressure. Max recommended pressures are there for a reason, but, I wouldn't hesitate to exceed the indicated max by as much as 10%. At my weight I would anticipate running 23's at 130-135, 25's at 120-125 and 28's at approx. 110-115. Other's mileage with regard to pressures and puncture resistance may very well vary.

    Check out this chart on tire drop. While this has little to do with flats it does address resistence and, IMO, comfort. Looking at my numbers, 194lbs + 22lbs bike * 55% = 119 on rear. The chart indicates I need 120 psi. If you up it to a 220 LB rider you'd need 140 psi for best results. Makes me wonder if anybody much over 210 should be on 23s?

  21. #21
    Senior Member Big Pete 1982's Avatar
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    Well, the max pressure on the Gatorskins says 120 psi. I'll start running them at 120. I'm leery of exceeding that. I'm sure they put that number there for a reason.

  22. #22
    Senior Member nkfrench's Avatar
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    I ran Mr Tuffys 1993-1997. I was getting a flat tire every 10 miles from goatshead thorns, the liners fixed that.
    Then a break from the bike.
    I started riding again 2008 and again put in Mr Tuffys. No problems with cuts.
    Then I got a new bike and started having flats again. I put in Mr Tuffys, no more trouble.
    When those tires wore out I put on armadillos. At first I had both the armadillos AND liners, then I decided to just try the armadillos. The only flats I got were when the presta valve broke.

    I decided a few years later that I was tired of always being at the back (or being dropped and getting lost) on group rides. I put on a lighter tire and got an extra 1mph which was enough to let me keep up with my ride buddies. The tire I was using is no longer marketed, so I am trying out Conti 4000's. OK so far.

    It took me a while to learn that it helps to avoid punctures (regardless of your tire/tube/liner configuration):
    ... avoid riding over grass or unpaved areas
    ... don't ride in the gutter or hug the right edge of the road
    ... watch where you put your wheels
    ... don't ride through puddles, over leaves, sand, other debris
    ... stay off the shoulder if it's safe to be on the roadway (no/low traffic, good sightlines)
    ... find a smooth track on the pavement
    ... replace the tires before they fail

  23. #23
    Senior Member TJClay's Avatar
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    I'll take any GP4000s you don't want off your hands.......
    ttp://pedalmybike.com/userTrackies/myTrackie3491.jpg[/img]

  24. #24
    Starting over CraigB's Avatar
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    I just put GP4000s on at the end of last season, and I love them, especially now with the HED Belgium wider rim wheels I built a few weeks ago. My triathlete co-worker bought a pair a few months ago when Ribble had them on sale and found that in 25s they won't clear his tri-bike's stays. So I swapped him a lightly-used pair of Vittoria Rubino Pro 23s. I think I got the better end of that deal, by far.
    Craig in Indy

  25. #25
    Senior Member rideorglide's Avatar
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    Quote Originally Posted by Big Pete 1982 View Post
    Well, I got some brand new Gatorskins on the bike today. Went for a test ride. Broke a rear spoke.

    bbeasley - I currently weigh about 245 lbs at 6'7. 700/23 tires both at 110 psi. I've pulled thorns out of the last few flats. Tiny little things that have no business puncturing a tire. I think the GP4000's ride great, but I don't trust them to keep me from getting a flat. My old Bontrager tank treads would have scoffed at those puny little thorns!

    I may need to look into getting new wheels. Well, at least a rear. I've broken a few spokes in the last year and a half. Currently riding Mavic Aksium 20 spoke front and rear. It seems like I've had almost no issues for 1000's of miles and now every ride I'm having problems!
    Believe me, those tiny things will even puncture a Mountain Bike tire if they go in at the right angle. All it requires is a pinprick into the tube and out comes the air.

    (I don't ride MTB often enough to deal with Stans sealant, but I sure steer clear of wild roses as far as possible ... except today, rode right over the slimmest of fresh growth wild rose creeper, fingers crossed I don't have a slow leak now.)

    For road, I use Serfas Secas the last 4 years. I don't know how many miles, but the tyres are sweet to ride despite the 130 PSI recommended.
    http://theoutsideinsideout.blogspot.com/

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