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  1. #1
    Senior Member
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    Changing wheel sizes on a road bike...?

    This winter I purchased a Specialized Allez bike. IT came with 700x23c wheels. I'm curious to know what factors should I take into consideration if I wanted to get someo wider wheels.

    I'm not even sure if this is advised or not.

    Just fishing for some knowledge...

  2. #2
    Senior Member miamijim's Avatar
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    The only factor to consider is if they rub on the seat bridge, brakes, or the chainstays. Other than that it doesnt matter.
    WWW.CYCLESPEUGEOT.COM 2005 Pinarello Dogma; 1991 Paramount PDG 70 Mtb; 1976? AD Vent Noir; 1989 LeMond Maillot Juane F&F; 1993? Basso GAP F&F; 1989 Terry Symmetry; 2003 Trek 4700 Mtb; 1983 Vitus 979

  3. #3
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    Most Road frames are designed for a 700x25 maximum tyre, Cyclocross or Hybrid frames take the wider tyres.

  4. #4
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    so it's a safe assumption that I could move up to 700x25?

    I plan on doing some touring with this road bike---and pulling a trailer. I know this isn't advised, but I thought widing the tires might help.

  5. #5
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    You could even go to 28mm if the tyre fits inside the brakes.
    Do you need clearance for fenders as well?
    I am currently using an old road bike wheel with a 32mm tyre. It is at the fat-end of the scale for this rim width but it's working.

  6. #6
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    I do not plan to put fenders on. I'll keep my eye out for some discounted wheel sets. Thanks for the info all.

  7. #7
    You need a new bike supcom's Avatar
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    You don't need a whole new wheel set. You just need two new tires. a set of 700x25c will fit onto your current rims with no problem. Much cheaper than new wheels.

  8. #8
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    sweet! Just new tires and new tubes? I'm going to have to do that.

  9. #9
    Senior Member clausen's Avatar
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    You don't need new tubes. Most tubes I've seen rated to take 23's are also rated to handle 25's. Even so pushing it a little won't cause any problems.

  10. #10
    slower than you Applehead57's Avatar
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    I've found no real difference between 700x23 or 700x25 or 700x26.
    It's really not readily apparent that the tire has the extra width, it's only a small difference.
    You can switch freely, not a crisis.
    "Lack of opportunity does not constitute virtue". Diana Tickle.

  11. #11
    cyclist/gearhead/cycli... moxfyre's Avatar
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    This article by Sheldon Brown tells you what sizes of tires work with what sizes of rims. For goodness sakes, don't go buying new wheels just because you're trying a new tire size!!
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  12. #12
    Senior Member closetbiker's Avatar
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    Quote Originally Posted by MichaelW
    You could even go to 28mm if the tyre fits inside the brakes.
    Do you need clearance for fenders as well?
    I am currently using an old road bike wheel with a 32mm tyre. It is at the fat-end of the scale for this rim width but it's working.
    I used an old road frame with fenders and had 32mm tires. It was at the limit and I had to remove the air from the tire before I could take he wheel off. A hassle so I replaced them with 25mm tires when the 32 mm wore out, but I enjoyed the thicker tire feel. Maybe my next frame will be a tourer or a mtn bike.
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