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  1. #1
    Senior Member Project88's Avatar
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    quick Q about 27in wheels

    Hey there quick Q I would really like to know the answer to and don't have time to go to go to my LBS

    I have 27x 1 1/4 tires on my bike can I put 27x 1in tires without changing the rims and tubes ? Thanks

  2. #2
    Senior Member CigTech's Avatar
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    most 27" rim can take a 1" wide tire.
    May your feet keep move'n with the wind to your back.

    CigTech

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    depends
    are these old steel rims with no clincher bead hook?
    Then i wouldn't risk it, as 1"wide tires will need something on the order of 80psi min to avoid pinch flats; and the tire will blow off the beadless rim around 70psi
    if these are modern aluminum rims then go for it
    Last edited by xenologer; 06-06-12 at 05:14 AM.

  4. #4
    GATC
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    Quote Originally Posted by xenologer View Post
    if these are modern aluminum rims then go for it
    modern meaning probably less than 30 yrs old, right? Or were there still new steel rims in the 80s?

  5. #5
    7-speed doomsday prepper ThermionicScott's Avatar
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    I would use 27x1-1/8", personally.
    Quote Originally Posted by chandltp View Post
    There's no such thing as too far.. just lack of time
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  6. #6
    Senior Member Kojak's Avatar
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    More important to know the ETRTO size of the tire/rim. A 27" tire (old style) is likely an ETRTO 630mm Diameter. Then you'll want to know the width of the rim (tire off, inside width bead hood to bead hook) in milimeters. This will allow you to determine what tires widths will fit. If you want to get these measurements, I can help you figure out what will work and what won't irrespective of whether or not you're interested in Schwalbe tires or not.
    Guy K. Browne

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  7. #7
    Senior Member Project88's Avatar
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    I had steel rims but i had them replaced about a month ago with AL. rims which i assume mean they are clincher.

    I was looking into theses tires
    http://www.biketiresdirect.com/produ...d-tire-27-inch

  8. #8
    Senior Member Kojak's Avatar
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    "25-630 mm" This was in the specs, so that should work, but you should check the rim width inside dimension just to make sure. This tire is 7mm narrower than the 27 x 1 1/4 and may be problematic if the rim is too wide.
    Guy K. Browne

    Schwalbe North America
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    1-888-700-5860 | 250-598-0397 ext.105
    www.schwalbetires.com

  9. #9
    Senior Member Project88's Avatar
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    Quote Originally Posted by Kojak View Post
    "25-630 mm" This was in the specs, so that should work, but you should check the rim width inside dimension just to make sure. This tire is 7mm narrower than the 27 x 1 1/4 and may be problematic if the rim is too wide.
    Thanks Kojak ! il measure the bead hood s when i get the chance possibly tomorrow. some one said 1 1/8 would be best any reason ?

  10. #10
    7-speed doomsday prepper ThermionicScott's Avatar
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    New aluminum rims, nice. I was basing my recommendation for 28's (1-1/8") on:

    1) the original steel wheels being non-hooked, meaning you might not be able to run high enough pressures to avoid pinch flats.
    2) 28's are a little more comfortable than 25's.

    I got the 27x1-1/4" version of those Paselas for my girlfriend's bike, and we both like the feel of them.
    Quote Originally Posted by chandltp View Post
    There's no such thing as too far.. just lack of time
    RUSA #7498

  11. #11
    incazzare. lostarchitect's Avatar
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    Quote Originally Posted by HardyWeinberg View Post
    modern meaning probably less than 30 yrs old, right? Or were there still new steel rims in the 80s?
    My friend has a Panasonic, bought new in 1989 with steel rims.
    1964 JRJ (Bob Jackson), 1973 Wes Mason, 2000ish Colian (Colin Laing), 2013 Velo Orange Pass Hunter

  12. #12
    Senior Member mechanicalron's Avatar
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    Some older steel rims have tiny little holes on each side of the wheel strip that makes for lots of flats at high PSI and the clinch is not as crisp as on alloy rims do to the rolled steel edg. I would stick with the 27" by 1 and 1/4". If you do go to 700c rims, make sure your brakes have the reach they need.
    "newbie at heart"

  13. #13
    Senior Member Kojak's Avatar
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    Quote Originally Posted by Project88 View Post
    Thanks Kojak ! il measure the bead hood s when i get the chance possibly tomorrow. some one said 1 1/8 would be best any reason ?
    My guess it's because that tire would be closer to the specification of what came on the bike originally. It's also going to be a bit more comfortable than the 1" tire (more shock absorbing). The only penalty you pay is the little wider tire will be a bit heavier, but I'd go with the wider tire too.
    Guy K. Browne

    Schwalbe North America
    USA | CANADA | Central/South America
    1-888-700-5860 | 250-598-0397 ext.105
    www.schwalbetires.com

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