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  1. #1
    Port Rocket-Sauce's Avatar
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    26' MTB Tires on 650c?

    Forgive me if this has been covered before. My attempts at using the search function have been fruitless.

    I am considering getting my daughter a road bike that comes with 650c wheels with 650c x 23mm tires. I'd like to put on some fatter tires since she still rides kind of rough (she is 8yo). Will 26" mtb tires work? Looking at Sheldon Brown's site, they both are 571mm. I am just hoping to find something wider than 650c x 23, preferably 650c x 28 or fatter. Can't get too fat, because the brakes will not clear. I am thinking 32s will be the widest. That would be 26 x 1.25, right?

    Thanks!

  2. #2
    Senior Member Bill Kapaun's Avatar
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    Nope. A 26x1.25 has a 559mm BSD. You have to keep to a 571mm BSD.

  3. #3
    coprolite fietsbob's Avatar
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    +1, want it to use 26"559 wheels ..consider getting an MTB/beach cruiser, then, in the first place..

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    you may be able to put MTB wheels on that bike (as mentioned, not interchangeable with 650c). and if you can build wheels you may be able to just purchase some MTB (559mm) rims and some new spokes. i did and rode my 650c bike for years that way. of course, then you may be searching for NARROW ENOUGH tires.

    the other option, and maybe a better one, is to run a wider 650c tire on there. the frame MAY be able to take a 650x28 tire. this is the one i use (and this is the only supplier that i know of). Serfas Urbana 650c x 28mm tire

    i've got a set, bought from them about six months ago, on my 650c bike...
    Last edited by hueyhoolihan; 08-19-14 at 10:16 AM.

  5. #5
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    Quote Originally Posted by Rocket-Sauce View Post
    I am considering getting my daughter a road bike that comes with 650c wheels with 650c x 23mm tires.
    I'd like to put on some fatter tires

    Can't get too fat, because the brakes will not clear.

    Thanks!
    Don't get a 650c road bike.
    Look for a light weight 26" mtb-wheeled or 24"

  6. #6
    7-speed doomsday prepper ThermionicScott's Avatar
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    Quote Originally Posted by Rocket-Sauce View Post
    Forgive me if this has been covered before. My attempts at using the search function have been fruitless.

    I am considering getting my daughter a road bike that comes with 650c wheels with 650c x 23mm tires. I'd like to put on some fatter tires since she still rides kind of rough (she is 8yo). Will 26" mtb tires work? Looking at Sheldon Brown's site, they both are 571mm. I am just hoping to find something wider than 650c x 23, preferably 650c x 28 or fatter. Can't get too fat, because the brakes will not clear. I am thinking 32s will be the widest. That would be 26 x 1.25, right?

    Thanks!
    The Terry 650x28C would probably be your best bet in that scenario: 650C Bicycle Tires from Harris Cyclery (ISO/E.T.R.T.O. 571 mm)
    Quote Originally Posted by chandltp View Post
    There's no such thing as too far.. just lack of time
    RUSA #7498

  7. #7
    Senior Member Grand Bois's Avatar
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    Pricey!

  8. #8
    Port Rocket-Sauce's Avatar
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    I have seen islabikes before, but $600 is quite a bit more than I can spend.

    I've also looked (online) at Fuji Ace 24, Fuji Ace 650c, Diamondback Podium Youth, Pinarello Speedy (and FP0), Scott Speedster 24", and Giordano Libero. They are all too expensive our budget. I've also been looking for small women's bikes on CL. FWIW, my daughter is ~4'08" and currently riding a 20" wheeled Gary Fisher.

    There is a 40cm, 650c bike in my neighborhood for $125 that is in nearly new condition. Can't really spend much more than that.

  9. #9
    7-speed doomsday prepper ThermionicScott's Avatar
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    Quote Originally Posted by Grand Bois View Post
    Pricey!
    Yikes, you're right. That Serfas is probably a better deal.
    Quote Originally Posted by chandltp View Post
    There's no such thing as too far.. just lack of time
    RUSA #7498

  10. #10
    Senior Member SquidPuppet's Avatar
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    Quote Originally Posted by ThermionicScott View Post
    Yikes, you're right. That Serfas is probably a better deal.
    I noticed off to the right it says "Actual width is 26mms."

    Above that Harris pretty much spells it out...

    There are no medium-width tires available in this diameter, just very narrow road tires and wide cruiser tires.

  11. #11
    7-speed doomsday prepper ThermionicScott's Avatar
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    I wonder what the future holds for 650C and other smaller wheel sizes. They're a good thing for keeping proper geometry on smaller frames, but since the tri-bike market is moving away from 650C, that wheel size may be at a dead end. Things aren't looking much better for the 24"/520mm/Terry, but they do have a Pasela in that size.

    One good thing about such a small rider is that a 25mm tire won't need to be pumped as much as it would for a full-grown adult, so it can still be a comfortable ride.
    Quote Originally Posted by chandltp View Post
    There's no such thing as too far.. just lack of time
    RUSA #7498

  12. #12
    Senior Member Bill Kapaun's Avatar
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    It MIGHT be possible to use 559mm WHEELS.
    The brake shoes would have to be adjustable enough to move 6mm closer to the axle.
    You might have problems with the rims being too wide for the brakes. IE getting the fatter tire through the pads to remove the wheel without deflating the tire or removing a pad or pads being spread far enough apart to not touch the rim.
    It all depends on what brakes are on it.
    Also, if it IS a real "road bike", you may not have clearance for fatter tires.

  13. #13
    Senior Member Grand Bois's Avatar
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    Quote Originally Posted by SquidPuppet View Post
    I noticed off to the right it says "Actual width is 26mms."

    Above that Harris pretty much spells it out...
    Did you read the rest? 26 mm falls into the medium width category.
    Last edited by Grand Bois; 08-19-14 at 01:21 PM.

  14. #14
    Senior Member SquidPuppet's Avatar
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    Quote Originally Posted by Grand Bois View Post
    Did you read the rest?
    I'm not sure which portion you are referring to. The part about the Terry tire being the answer etc.?

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