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  1. #1
    Right calf grease tattoo Alphie's Avatar
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    Beads: Wire vs. Kevlar

    I know this has probably been asked before, so please excuse me in advance.

    Is there any reason (besides cost) that I should run wire bead 700c x 25 tires on my road bike instead of a good quality Kevlar bead tire? Flats always happen at an inopportune time and to have a tire a little easier to mount would be a very good thing.
    Without deviation from the norm, 'progress' is not possible.
    Frank Zappa

  2. #2
    I drink your MILKSHAKE Raiyn's Avatar
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    Nope

  3. #3
    Just ride. roadbuzz's Avatar
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    Sometimes people choose a wire bead for a tire that mounts on a rim easily (i.e. big bead circumference, small rim circumference), since kevlar can stretch.

  4. #4
    Senior Member Retro Grouch's Avatar
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    Quote Originally Posted by Alphie
    I know this has probably been asked before, so please excuse me in advance.

    Is there any reason (besides cost) that I should run wire bead 700c x 25 tires on my road bike instead of a good quality Kevlar bead tire? Flats always happen at an inopportune time and to have a tire a little easier to mount would be a very good thing.
    Kevlar bead tires have two advantages, they weigh less and they fold so you can pack along a spare more easily if you go on a trip or something. The first time that you mount them can be a trip but my experience has been that they go on much more easily after the initial mounting has given them some shape.

    So far as saying which, wire or kevlar bead tires, go on and off more easily by the side of the road, I'd say that the varience within each type is greater than the varience between the two types. To me they're the same.

  5. #5
    Senior Member sydney's Avatar
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    Quote Originally Posted by roadbuzz
    Sometimes people choose a wire bead for a tire that mounts on a rim easily (i.e. big bead circumference, small rim circumference), since kevlar can stretch.
    All wrong.

  6. #6
    Right calf grease tattoo Alphie's Avatar
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    Thank you everyone, for the input. My next tire purchase will probably the the Kevlar bead variety.
    Without deviation from the norm, 'progress' is not possible.
    Frank Zappa

  7. #7
    Just ride. roadbuzz's Avatar
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    Quote Originally Posted by sydney
    All wrong.
    Nuh-uh!!!!

    Care to elaborate?

  8. #8
    You need a new bike supcom's Avatar
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    Kevlar stretches very little. Maybe 1 or 2% at the most. I doubt that any stretch would be permanent.

  9. #9
    Senior Member
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    for what its worth, I've had Kevlar tires that were very easy to put on and take off, and I've had some that are very very very hard to remove/put on.

    these are all mtn bike tires.

  10. #10
    Senior Member sydney's Avatar
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    Quote Originally Posted by Rambo
    for what its worth, I've had Kevlar tires that were very easy to put on and take off, and I've had some that are very very very hard to remove/put on.

    these are all mtn bike tires.
    ....same with wire beads. Funny how that works.

  11. #11
    Senior Member
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    Quote Originally Posted by sydney
    ....same with wire beads. Funny how that works.
    isn't it!?!

  12. #12
    Just ride. roadbuzz's Avatar
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    Quote Originally Posted by supcom
    Kevlar stretches very little. Maybe 1 or 2% at the most.
    So, for a tire with a 622 mm diameter bead, ~1.95 - 3.9 cm over the circumference. Probably enough to significant if the tire were loose on the rim to begin with. Wouldn't matter if the stretch were permanent, just lasting until the tire to blew off the rim!

  13. #13
    Campy or bust :p cryogenic's Avatar
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    My Kevlar bead Ritchey Speedmax 2.0 Pro tires are no easier to mount and dismount than my old wire bead Continental Town & Country tires. I expected them to be easier, but they're certainly not. They are considerably lighter though (200g each).

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