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  1. #1
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    Widest tires on a typical road bike?

    I want to get a road bike but I'm nervous about the skinny tires, I'm 6'1 270 so I don't want to overload them. If I were to get a road bike what's the widest tires that I'll fit on a typical road bike wheel? To exame what would be on a Specialized Allez or Secteur?

  2. #2
    ride lots be safe Creakyknees's Avatar
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    Most of them are going to come stock with 23c tires. I weigh 190-ish and I use 25c which are just a bit wider. My bike, a Cannondale, could probably fit a 28c tire which is getting into touring sizes but the clearance would be tight.

    As you're shopping, ask the shop to mount a 28c pumped up to 100 psi and see how it fits in the bike. At your weight I'd recommend that over a 25 but take a 25 as an alternative.
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    ride lots be safe Creakyknees's Avatar
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    oh also, check out the spoke counts - 24 rear / 20 front is too little for your weight, I'd recommend 32/32 if they offer it
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    I think a lot of frames (not high end race ready frames) can be equipped with 28c tires, which should be good enough for your weight.

  5. #5
    Have bike, will travel Barrettscv's Avatar
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    The short reach brakes on most road bikes will limit you to a max size of 700 x 28. Some forks and frames are tighter still, but most bikes will allow a 700 x 25.

    I've been between 250 and 210 lbs during the last few years. I started on 700 x 28 but now use 700 x 25 without worry.

    I also started with a Cyclocross bike, these are drop-bar road bikes with brake systems and clearence for larger tires, 700 x 35 or larger. Cyclocross bikes are often tougher than road bikes, since thay are raced off-road.

    You might visit this forum here at bike forums for more info: http://www.bikeforums.net/forumdispl...-(200-lb-91-kg)
    Last edited by Barrettscv; 10-27-10 at 11:28 AM.

  6. #6
    Senior Member mkadam68's Avatar
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    I wouldn't overly worry about the tire width. As creakyknees said, check the spoke count. 32-spokes is where you'll want to be.

    A skinnier tire may only wear more quickly, requiring replacement ($$), whereas a wider tire will give a more comfortable ride while adding a small amount of rolling resistance. I ride 23's almost exclusively and only weigh about 15-20lbs. less than you.

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  7. #7
    In beaurocratic limbo urbanknight's Avatar
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    As said above, I'd only worry about tire width if your weight is causing a tire pumped to the max psi (maybe even 10 or 20 above) to pinch flat. If that happens, a wider tire will spread the load out so the tire doesn't deform so much that it pinches the tube into the rim.
    http://www.rouesartisanales.com/article-1503651.html

    That being said, it varies but most bikes will be able to handle up to 28. My Specialized Allez has 25's on and it looks like there's room for more.
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  8. #8
    Lost AngryScientist's Avatar
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    wheels are what to worry about, not tires at your weight.

  9. #9
    Galveston County Texas 10 Wheels's Avatar
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    36 spoke wheels with 700 X 28 tires.... Good to go.
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  10. #10
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    Quote Originally Posted by mkadam68 View Post
    A skinnier tire may only wear more quickly, requiring replacement ($$), whereas a wider tire will give a more comfortable ride while adding a small amount of rolling resistance.
    Counter-intuitively wider tires (of the same construction) have lower rolling resistance at the same inflation pressure.

    Huge differences exist between different tires though - ones with supple carcasses can take 20W less to turn at 18-19 MPH.

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