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large tires on a 700c road rim?

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Old 11-27-07, 09:50 PM
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large tires on a 700c road rim?

Edited - Does My Bike Have Enough Tire Clearance???

Last edited by fatigoworld; 11-28-07 at 12:22 PM.
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Old 11-27-07, 10:00 PM
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I have a friend who has succesfully run 29er mtb tires on open pro road rims with Stans sealant.
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Old 11-27-07, 10:18 PM
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I was just giving it as a point of reference... no way will you be able to fit mtb tires on a road bike.

But to answer your question, I assume you could do it without sealant. He did have some issues with some tires blowing off the rim, so be careful.
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Old 11-27-07, 11:00 PM
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Originally Posted by Pete Fagerlin
Search this thread for "mushroom" and similar words.
Have fun sorting through Scrublover's posts.
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Old 11-27-07, 11:07 PM
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Originally Posted by fatigoworld
well its a 27 inch road bike with 700c wheels, the tire clearance is HUGE, and i measured exactly and 45mm is playing it safe, but thanks for making me type a lot. im really asking the wrong person, a straight answer from someone who actually knew the answer would have been preferable.....
If you want an answer from someone reputable, how about this:

https://sheldonbrown.com/tire_sizing.html#width

The chart and info on that page should help you out.
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Old 11-27-07, 11:28 PM
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Originally Posted by BenLi
Have fun sorting through Scrublover's posts.
Those are mostly fungi.
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Old 11-27-07, 11:58 PM
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What road bike do you have? I have a 700x28 road tire on the back of my road bike and there is maybe 5mm clearance under the brake caliper. There is no way a 45 would go in there.
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Old 11-28-07, 12:06 AM
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I'm running a wire-bead 700x38c tire on Open Pro rims, and they are blowing off past 45 psi. YMMV
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Old 11-28-07, 10:58 AM
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I'm curious what frame you're using. I won't argue with ya, I'm just curious.

I have a Cross Check which is technically not a "road bike" with 700x48 (29x2, 28x2, 622-50, whatever) and it is tight.

Also, before you get and mount the tires, be sure the rest of the bike's geometry can handle it. Specificially TOE OVERLAP with the front wheel. My surly is designed for fatties, and I still have toe overlap trouble over 38mm.

You might want to try the commuter forum with this post also. A lot of guys there have rigs set up like this. You may find someone there has the exact bike and can give you better advice.
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Old 11-28-07, 11:40 AM
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From Sheldon's site linked above:

If you use a very wide tire on a narrow rim, you risk sidewall or rim failure. This combination causes very sloppy handling at low speeds. Unfortunately, current mountain-bike fashion pushes the edge of this. In the interest of weight saving, most current mountain bikes have excessively narrow rims. Such narrow rims work very poorly with wide tires, unless the tires are overinflated...but that defeats the purpose of wide tires, and puts undue stress on the rim sidewalls.
Which has been covered in this thread but I quess you just didn't want to acknowledge that.

A table summarizing which tires fit which rims is odd because not all tires of a given size are created equally...let me rephrase that...no tire of a given size is created equally.
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Old 11-28-07, 12:02 PM
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fatigoworld, what Pete's been trying to tell you, correctly, is that the 45mm tires will likely be wider than 45mm when mounted on your rims. The ballooning of a tire, on too narrow a rim, IS going to present problems, IMO. Fit, as well as handling issues may present themselves. The tires will be running much more on the center than the design intended.
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Old 11-28-07, 12:21 PM
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Originally Posted by fatigoworld
i know my posts come off as angry, and thats because i am. i ask a very simple question and then get bombarded by people telling me i dont have enough tire clearancewhich has nothing to do with my question. and neither does saying "its possible". and then on top of it you, specifically you, are insulting, condesending and at your best, not very well informed.

post #2 is speculation, meaning it can be done....but safely or reccomended? i have friends that do a lot of things i wouldnt do. and post #6 was by me. youre just all over the place. maybe youre thought process is actually correct in your head but it just comes out in a skewed manner. i have nothing left to say to you, except......grow up....
You had best delete all of your posts here...we already have enough idiots in this forum.
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Old 11-28-07, 12:59 PM
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Originally Posted by fatigoworld
Edited - Does My Bike Have Enough Tire Clearance???
Roger Roger, What's our Vector Victor!
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Old 11-28-07, 05:50 PM
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So, seriously

Whats with all the arguing in the mountain bike forum?
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Old 11-28-07, 06:31 PM
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I disagree.
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Old 11-28-07, 06:47 PM
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Troublemaker!
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Old 11-28-07, 07:43 PM
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Originally Posted by Pete Fagerlin
No you don't.
Nice.
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Old 11-28-07, 09:15 PM
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Originally Posted by BenLi
Nice.
I disagree.
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Old 11-28-07, 09:16 PM
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Originally Posted by mcoine
I disagree.
I disagree with your disagreement.
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