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Old 08-19-14, 08:04 AM   #1
Rocket-Sauce 
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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!
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Old 08-19-14, 08:28 AM   #2
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Nope. A 26x1.25 has a 559mm BSD. You have to keep to a 571mm BSD.
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Old 08-19-14, 08:36 AM   #3
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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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Old 08-19-14, 09:10 AM   #4
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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...

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Old 08-19-14, 10:01 AM   #5
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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"
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Old 08-19-14, 10:08 AM   #6
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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)
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Old 08-19-14, 10:35 AM   #7
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Pricey!
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Old 08-19-14, 10:51 AM   #8
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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.
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Old 08-19-14, 11:04 AM   #9
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Pricey!
Yikes, you're right. That Serfas is probably a better deal.
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Old 08-19-14, 11:38 AM   #10
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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...

Quote:
There are no medium-width tires available in this diameter, just very narrow road tires and wide cruiser tires.
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Old 08-19-14, 12:01 PM   #11
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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.
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Old 08-19-14, 12:08 PM   #12
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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.
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Old 08-19-14, 12:13 PM   #13
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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 12:21 PM.
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Old 08-19-14, 12:20 PM   #14
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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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