C Law

Does anyone know how big a 700cc tires you can fit in a 1x1 frame and fork?

thanks

chimblysweep

really big. it's the fatties fit fine thing-- i'm sure it will take anything you can find in a 700 tire. (700s don't usually come all that fat anyway, mtb tires are 26")

C Law

Well, let me rephrase then since there are quite a few large 29er tires out there for mountain biking (29x2.3'')

I was looking to fit 700x49's in there. Is it a possibility or not?

Thanks

chimblysweep

Tire clearance: FFF(Fatties Fit Fine) chainstays up to 2.7"

jim-bob

Why would you want to do such a thing? It's gonna hose your handling.

baxtefer

I'm going to say no. You're trying to stuff large 700c tires into a frame designed for 26" wheels
I don't think width is going to be a problem. But since 700c rims already have a larger diameter than 26" rims, you might run into clearance issues with the brake bridge.
Why not use the Karate Monkey, which is designed for 700c wheels in mind.

Or ask surly for their opinion.

C Law

Thats for 26'' wheels. I am asking about 700cc or so called 29'' wheels which will be a different animal since the frame was not designed to accomodate them. But since the clearance is so large for 26'' wheels it will accept some 29'' wheels also.

I appreciate your quick responses though.

Cynikal 

49*.0393 = 1.9ish. So yes you can fit 49's

C Law

I already have a 1x1.

I do not have a karate monkey.

C Law

How is that? I am not disagreeing just wondering.

I mean, a large volume 26'' 2.7 tire is not going to be far off the circumference of a 29'' 1.75'' tire is it?

ink1373

or just get a pugsley!

C Law

Would love too. Wife says 5 bikes is enough though

jim-bob

I'm sorry, I'm not sure I understand what you're trying to do. Do you not have 26" wheels hanging around? What's your reasoning for going with 700c? Most of the wheels I've seen passing as "29er" have had fairly massive tires on them, but I suppose you could find smaller ones.

What are you planning on doing about braking?

I'm thinking your best bet is to find a friendly shop with a bunch of fat 700c tires and just mess around to see what you can get away with. Unfortunately, this requires the aforementioned friendly shop.

baxtefer

well a 26" wheel has a bead seat diameter of 559mm
a 700c wheel has a bead seat diameter of 622mm

so you're looking at a ~63mm (2.5 inch) difference in wheel diameter right off the bat.




I'm assuming you're going to run discs?

C Law

Yeah, front disc only. It is going to be an on/off road fixed gear bike. I was figuring large cyclocross tires might be good. I am not hell bent on 700cc wheels, I was just wondering if anyone has had experience doing this. I have seen it done before I believe and I thought there was an old thread on this but I couldn't find it. Friendly shop should be no problem. However, it might have to wait as friendly shop becomes not no friendly when you come in with crap that can wait until after the springtime/early summer.

isotopesope

why not? how would that "hose" the handling?

my friend had a moots ybb that is designed for 26" wheels, but ran 700c x 35 wheels/tires on it, with front and rear disc brakes. it worked perfectly. he probably couldn't have run a larger tire though, with consideration for mud clearance. with the capability of running 2.7 wide 26" tires on the 1x1 and as cynikal pointed out, a 49mm tire would be 1.9 inches wide. i bet it would work.

keithr

See "Da Bizniz At Hand" for Surly's comments on 29" wheels on a 1x1. https://www.surlybikes.com/2005_02_01...ogarchive.html

Ira in Chi

For those too lazy to search the blog:

Da Bizniz At Hand:

A) Several folks have been asking lately about using the 1x1 frame with 29" wheels. Is this on a chatroom somewhere? The answer is yes and no.
>CAN you do it? Yeah. 29er wheels will fit, and even have decent mud clearance.
>SHOULD you do it? No, probably not. Not only will it alter your geometry somewhat (notably BB height), but also, since the larger diameter wheels have to sit further back in the dropouts, you lose a bunch of dropout length normally reserved for tensioning the chain. You may get lucky and choose a suitable gear combo that allows the perfect amount of chain, but this will require quite a bit of playing around with rings, cogs and chains and may still be fruitless. So really, no, the 1x1 is not a 29er. But hey, don't let me stop you...
Oh, and you'll have to use disc brakes if you do this, of course.
A better bet might be to throw a 29" on the front and leave it 26" in back. Better up front traction and a stronger, more torquey rear. It's the latest thing. Better jump on it. Of course the 1x1's geometry will be screwed doing it this way, but it'll only feel weird for a little while. Or longer. But it's not for me; I'm sticking to one wheel size for the bikes I ride (as opposed to my many ongoing experiments), if for no other reason than only having to carry one size spare tube. I'm too disorganized to find more than one spare tube as it is.

dobber

A while back Tony over at IRO (www.irocycle.com) had a pic of the Mia with 29'ers mounted.

C Law

Thanks, do you know me?

I am going to give it a try. I know the handling will be a little weird but the higher bb height might be all that bad an idea for off road fixing.

On tire circumference, according to the schwalbe website, a 26'' 2.4'' tire would have to same circumference of a 700x28 tire (too small to ride offroad).

However, a 700x40 (1.6'')tire would only have an additional 70mm in circumference than a 26x2.4 tire.

70/pi=22.3mm approx. in additional tire diameter /2=11mm in additional bb height and 11mm in additional tire clearance (height) needed. I think 1.115cm seems doable, especially since we are using 26x 2.4'' tires as an example and the 1x1 says 2.7'' is fine.

I am going to try it and let you know how I do. Could be a while to get the parts an build the wheels though.

Thanks for the input guys and gals

riderx

Search the MTBR.com 29er board, it's been done and there are pix out there. You'll get a higher BB, but the rest of the geometry should pretty much stay the same. DH bikes run a higher BB, you might compare it to some of them and see what the numbers look like.

C Law

Thanks

I knew I read / saw it somewhere before.

Looking at the pix, I should be more than fine with 1.5-1.75 tires.