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  1. #1
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    Road bike tire sizing and diameter

    My road bike currently has 700x23 tires (some flavor of Conti Gatorskins). They're getting a bit old and I want to replace them before I start doing some longer rides this year (MS150, maybe Seagull Century, etc). I'd like to go up a size or two, but the clearance between the rear tire and brake bridge is small, 1/8", maybe less. Would I be able to move up to a 25 or 28 size tire? How much to road bike tires grow in diameter as they get wider? I have plenty of space for extra width.

    Also, what's a good general purpose tire for fast recreational riding and general noodling around? I would like something on the tough side since I'm not used to road bikes and don't avoid obstacles as well as I should (pothole, what pothole? ).

    Chris

  2. #2
    Senior Member capwater's Avatar
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    25 will work for sure. Go with one of the carbon lined tires (Hutchinson or Michelin is great). Real tough is Specialized Armadillo, though the ride is a bit harsher.

  3. #3
    cab horn
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    $20 USD will get you a rubino. Kevlar lined. Nothing fancy, durable tire.
    Mes compaingnons cui j'amoie et cui j'aim,... Me di, chanson.

  4. #4
    Senior Member
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    My Bontrager Xlite race 700X28 foldable measure 26 mm wide, so they will probably fit. They roll easily and hold the road well. They are kevlar belted.

  5. #5
    Senior Member Bikedued's Avatar
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    I recently got some 700x25 Serfas Seca's. Very nice ride, and dual compound tread. Best of all they won't break your wallet. I think I paid somewhere between $15-$20 a piece.,,,,,BD
    "Whale. Oil. Beef. Hooked!" The Rumjacks

  6. #6
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    I've got a stupid question. hopefully I can just get it answered in here rather than starting a new thread. I've been into mtb for years but I'm totally new to road bikes. I have the same 700x25 tires on my trek and I want to get a couple of spare tubes but all the tubes I look at say 700x20/28 like this one:

    http://www.specialized.com/bc/SBCEqP...jsp?spid=26662

    does that mean it will fit anything between a 20 and 28?

  7. #7
    Senior Member capwater's Avatar
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    Quote Originally Posted by rha600
    I have the same 700x25 tires on my trek and I want to get a couple of spare tubes but all the tubes I look at say 700x20/28. Does that mean it will fit anything between a 20 and 28?
    Yup ........

  8. #8
    Senior Member Bikedued's Avatar
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    Sounds like it. 20 to 28 is not too big of a stretch, no pun intended.,,,,BD

    Think about it this way, a 1 1/4" 27 inch tire is a 32....
    "Whale. Oil. Beef. Hooked!" The Rumjacks

  9. #9
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    awesome. thanks.

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