Results 1 to 13 of 13
  1. #1
    RoadBikeReview Member
    Reputation:
    Join Date
    Oct 2004
    Posts
    339

    Continental GP4000 23 mm vs. 25 mm, any thoughts ?

    I have been using various Conti tires for 10+ years, great tires for me (210 pounds) on 2 diff bikes and several diff wheels. Always had 23 mm (other than Attack / Force combos, which are a little diff). GP 4000 also come in 25 mm, anyone have any comments, better, worse, or indifferent, about 25 mm vs. 23 mm. I ride on good roads, don't have many flats (and most aren't pinch flats), so flatting isn't really an issue, I am more curious about how the size might affect the ride, and rolling resistance, or if the difference in size even makes a noticeable difference.

    Thanks,
    Doug

  2. #2
    RoadBikeReview Member
    Reputation:
    Join Date
    Oct 2004
    Posts
    339

    I was apparently blind and didn't notice earlier post on this topic

    OK, shoot me

    I now see that there was an earlier that addressed this topic, not specifically these tires, but the topic of 23 mm vs. 25 mm tires. If anyone has anything to add, thanks much. If not, it seems like those few who replied to the earlier post like the end result of switching to the 25 mm size.

    Thanks,
    Doug

  3. #3
    Big is relative
    Reputation: bigbill's Avatar
    Join Date
    Feb 2005
    Posts
    11,526
    Quote Originally Posted by DBtheCyclist
    OK, shoot me

    I now see that there was an earlier that addressed this topic, not specifically these tires, but the topic of 23 mm vs. 25 mm tires. If anyone has anything to add, thanks much. If not, it seems like those few who replied to the earlier post like the end result of switching to the 25 mm size.

    Thanks,
    Doug
    Conti is selling a 700X24 GP for 2009. www.probikekit.com had them for a pretty good price (if they are in stock). That should end the discussion for now.
    Retired sailor

  4. #4
    RoadBikeReview Member
    Reputation:
    Join Date
    Oct 2004
    Posts
    339

    Haven't seen 2009 Grand Prix tires on probikekit for some time.

    I remember seeing them once (I visit that site, and order from there, often), weeks/months ago, haven't since, nor can I find them now (can't even find the item, which you can find for other out-of-stock Contis). If you can find them, please post a link. Right now, PBK is out of most Conti GP tires, excepting GP 4000 in a few colors (none of which I want).

    Doug

    Quote Originally Posted by bigbill
    Conti is selling a 700X24 GP for 2009. www.probikekit.com had them for a pretty good price (if they are in stock). That should end the discussion for now.

  5. #5
    banned
    Reputation:
    Join Date
    Dec 2006
    Posts
    3,270
    Get the 25's. At least. If your bike can accomodate bigger tires, 28's, get those.

  6. #6
    RoadBikeReview Member
    Reputation:
    Join Date
    Oct 2004
    Posts
    339

    I may well try the 25's, no way going to 28's

    I don't think 28's would fit anyway (Easton EC90-SLX fork), and I ride a road bike, not a mountain bike I have Reynold's Assault carbon fiber wheels, and no way I am putting 28's on those wheels, making a change from 23's to 25's would be a leap enough for me !

    Doug

    Quote Originally Posted by lookrider
    Get the 25's. At least. If your bike can accomodate bigger tires, 28's, get those.

  7. #7
    RoadBikeReview Member
    Reputation:
    Join Date
    Oct 2005
    Posts
    2,170
    im running gp4seasons 23/25. I'm 180-190lbs and appreciate the ability to run the rear at 100-105 to soften things up a bit, still avoid snakebite. and no, with a tire like this, you can't tell the difference in ride, or hardly by looking at them.
    I can't stand having flats, and much of my regular route now is about 3-4 miles of partly paved roads, and pretty steep climbs with fast descent right after.

  8. #8
    RoadBikeReview Member
    Reputation:
    Join Date
    May 2010
    Posts
    7
    I run Continental GP4000 25c on my bike on Easton 90 SLX wheels. I weigh 180 and I am 5'10, I don't think that really matters. What does matter is that they run great on Texas chip seal type roads. The tires help most on rough roads not for pinch flat protection or being over weight.

  9. #9
    RoadBikeReview Member
    Reputation:
    Join Date
    Jan 2009
    Posts
    463

    gp4000 25mm

    [QUOTE=DBtheCyclist]I don't think 28's would fit anyway (Easton EC90-SLX fork), and I ride a road bike, not a mountain bike I have Reynold's Assault carbon fiber wheels, and no way I am putting 28's on those wheels, making a change from 23's to 25's would be a leap enough for me !

    Doug[/QUOTE

    GP4000 appears to run wide. I have installed grand prix 24mm and it seems like older continental (grand prix).

  10. #10
    A wheelist
    Reputation: Mike T.'s Avatar
    Join Date
    Feb 2004
    Posts
    9,589
    Quote Originally Posted by DBtheCyclist
    I don't think 28's would fit anyway (Easton EC90-SLX fork), and I ride a road bike, not a mountain bike I have Reynold's Assault carbon fiber wheels, and no way I am putting 28's on those wheels, making a change from 23's to 25's would be a leap enough for me !
    Doug
    That means nothing. I have 28mm Contis that are narrower that 25mm Vittorias. Maybe within the same tire model it means something. Maybe.
    .
    Mike T's home wheelbuilding info - dedicated to providing Newby wheelbuilder information and motivation.

    I'm not cranky; I just have a violent reaction to stupid people.

  11. #11
    RoadBikeReview Member
    Reputation:
    Join Date
    Dec 2004
    Posts
    91
    Since you rides on good roads, you may also want to try other 25mm tires. GP4000 feels plastic to me. I personally ride michelin pro race 3 23mm front and krylion 25mm back and they feel great. Below are some recommended 25mm tires

    Vittoria Open Pave
    Michelin Pro Optinum

    Both can be purchased from PBK.

  12. #12
    RoadBikeReview Member
    Reputation:
    Join Date
    Feb 2010
    Posts
    3
    The Conti GP 24's aren't bad, alot more comfortable than the 4000 A/S. Personally, I stick with the Rubino Pros(23's)...I've had many accidental off-road adventures with them and only a few minor 1/32-1/16" nicks in them, plus they're dirt cheap to replace. And being 220lb., I can also put 130psi in them an they don't ride like a lumber wagon.

  13. #13
    RoadBikeReview Member
    Reputation:
    Join Date
    Feb 2007
    Posts
    205

    Conti gatorskin 25's

    i use conti gatorskin 25's for racing and training and feel like the ride is better than 23's.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

INTERBIKE

Contest

Hot Deals See All Hot Deals >>

Interbike Featured Booths

Check out the hottest road bike products from these brands!



















See All Interbike Coverage - Click Here »


Latest RoadBike Articles


Latest Videos

RoadbikeReview on Facebook