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  1. #1
    Join Date
    Jun 2006
    Location
    Albuquerque, NM
    Posts
    120

    Dumb question about tire size

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    How do I know how large of a tire will fit on my bike? I have 700x23 on it right now, but was thinking of getting something a bit wider like 25 or so (I want to use it for commuting). How do I know what will work?
    Thanks!

  2. #2
    Join Date
    Jan 2006
    Location
    Massachusetts
    Posts
    2,559
    700x25 should be fine. Maybe even 700x28. If you try them and they fit on the rims fine and they clear the frame adequately, then use them. The fatter tires will be harder to get between the brake calipers unless you have a quick release on the calipers or levers.

  3. #3
    Join Date
    Jul 2003
    Location
    North Andover, Massachusetts USA
    Posts
    1,643
    I don't know about the 700x28 - it probably depends on the type of brakes you have on your bike.

    I run 700x28 (or 700x32) on one of my touring bikes, but the bike has cantilever brakes (mountain bike style brakes). And while I haven't tried 700x28 with the side-pull brakes on my road bike - well, at best it would be very tight.
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  4. #4
    Join Date
    Aug 2001
    Location
    Iowa
    Posts
    898
    The 700x28's will fit. But it is difficult to get them through the brakes when fully inflated. I just wait to inflate until after the wheel is back on the bike and the tire is past the brakes.

    annie
    Time is a companion that goes with us on a journey. It reminds us to cherish each moment, because it will never come again. What we leave behind is not as important as how we have lived." Captain Jean Luc Picard

  5. #5
    Join Date
    May 2005
    Location
    Tustin, CA
    Posts
    1,308
    usually if you detach the brake pulley the wheel will go on without problem.

    To the original question - as long as you buy a 700X you should be ok. You can easily transition from 700X23 to 700X25 and some brake adjustment might be needed for 28's or above.
    BCIpam - Nature Girl

  6. #6
    Join Date
    Apr 2005
    Location
    Vancouver, BC
    Posts
    3,936
    I have a tiny frame and was told a few times that 700 X 28 wouldn't fit.

    Make sure it works for your wheels/frame setup before you go and buy a pair...

  7. #7
    Join Date
    May 2005
    Location
    Tustin, CA
    Posts
    1,308
    Grog: Does your bike already have 700c wheels?? If it has 650 then no it wouldn't work but it's unclear if you already have 700c wheels why 28's wouldn't work. Anyone out there have an answer?
    BCIpam - Nature Girl

  8. #8
    Join Date
    Apr 2005
    Location
    Vancouver, BC
    Posts
    3,936
    Quote Originally Posted by bcipam
    Grog: Does your bike already have 700c wheels?? If it has 650 then no it wouldn't work but it's unclear if you already have 700c wheels why 28's wouldn't work. Anyone out there have an answer?
    I do have 700C, but it wouldn't fit. 25C would probably though. Strange frame configuration I guess.

 

 

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