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View Full Version : 700c on MTB Frame?

Cat3roadracer
10-26-2011, 07:43 PM
Has anyone had success with this combination? I thought it might be cool, maybe not. I think the Paul Moto brakes will have enough reach to reach the rim.

Any pictures of successful builds?
stien
10-26-2011, 07:51 PM
29er=700c, no?
Cat3roadracer
10-26-2011, 07:57 PM
I'm really off tonight, I apologize. This is a "normal" 26" wheeled MTB frame.
celeste
10-26-2011, 07:57 PM
Could you be more specific? I've rode a variety of zero cost bikes where I put a road fork on a MTB frame (rockhopper) where I used both cantilevers and calipers.
tuscanyswe
10-26-2011, 07:58 PM
Id think most mtbs will fit a 700c with a road tire. As you say brakes may be an issue.

these could be an alternative if looks aint a priority :)
http://thegoat.backcountry.com/2008/10/28/from-mountain-bike-wheels-to-700c-with-the-mavic-caliper-adjuster/
lucychen
10-26-2011, 08:05 PM
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Mr. Squirrel
10-26-2011, 08:08 PM
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thwart
10-26-2011, 08:13 PM
Go get 'im, Mr. Squirrel... :D
Autobutcher
10-26-2011, 08:20 PM
Is there a reason you dont want to just run slicks on the 26" wheels?
Cat3roadracer
10-26-2011, 08:26 PM
I have a set of 700c single speed wheels that I could use, no other reason.
markie
10-26-2011, 08:52 PM
Normally you will be limited to smaller tyres. Cross tyres will probably fit.

If you have disc brakes then everything is easy. If not, you could always go brakeless fixie....
avalonracing
10-26-2011, 09:17 PM
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Gummee
10-26-2011, 09:55 PM
I've never tried with on rim-brake wheels. I have done it temporarily with a disc brake equipped mtn bike.

I know Cannondale had success with their Bad Boy series. Basically they were F-series mtn frames with road rims.

M
Jack Brunk
10-26-2011, 09:59 PM
MTB rear spacing is 135mm

Road wheel set spacing is 130mm

No?
mavic1010
10-26-2011, 10:04 PM
I did this on one of my mountain bikes. it was meant for 26" wheels. The difference was I had a set of 700c wheels built on XTR hubs. In addition, I was using disc brakes so no issues on adjusting brakes.
stien
10-26-2011, 10:05 PM
MTB rear spacing is 135mm

Road wheel set spacing is 130mm

No?


If it's steel, you're okay. Aluminum or carbon, nerp.

I just put 130mm in 135mm dropouts on an old steel Novara tourer.
markie
10-26-2011, 10:07 PM
MTB rear spacing is 135mm

Road wheel set spacing is 130mm

No?


The OP did not mention the spacing of the wheels. I have a 700C single speed wheels with 120mm, 130mm and 135mm spacing.

If it was just 5mm and a steel frame I would not worry about it. (My IF planet X is 130mm spaced, but I had to use a 135mm hub to get a good fixie chainline. I do not have any problems).

Otherwise some hubs are easy to re-space or just use washers to bulk them out. Depends how ghetto you want to go...
rain dogs
10-26-2011, 10:16 PM
Yes, you can totally do it.... and it makes for an awesome everyday, tough work/winter bike. Now, I don't know how much "road" you want in your "mountain" bike, but I've gone almost all the way.

http://cimacoppirides.files.wordpress.com/2010/12/konaconvert.jpg?w=700&h=417

The things to consider are:

1. Chain stay clearance (I can run a 53, but no inner ring is possible)
2. Road fork changes geometry to pursuit style mountain bike (faster! :D )
3. Reach on rear brakes, but long reach or center pull should do.
4. Spacing.... ahhh..... use washers... but on steel it's no problem, just clamp it and go!
Iowegian
10-26-2011, 10:22 PM
Sounds like a lot of trouble for little gain. I'd just find a hybrid frame if you want to go this route.

Mtb rim diameter = 559mm and 700c rim diameter = 622mm for a difference in radius (brake position) of (622-559)/2 = 31.5mm. That's more than virtually any brake will handle so as stated above, unless you're running disc's or a no-brake fixie it's not going to work unless you want to move the canti mounts on the frame.
rain dogs
10-26-2011, 10:29 PM
Sounds like a lot of trouble for little gain. I'd just find a hybrid frame if you want to go this route.

Nah. Not at all.... it's no work, and it's tons of gain. In fact, it's the opposite of what you've said. :beer:

If you have the frame, and the wheels (which the OP said he does) it's five minutes of switching parts and it's done.

The toughest part is finding a brake that reaches, but that's not so hard. You don't even have to switch the derailleur and cranks, but it's fun if you do!

My winter bike is awesome... I love riding it.
Iowegian
10-26-2011, 10:37 PM
Yah, our posts crossed in the ether and I think you did a really nice job on your conversion but...you'll still need a fork and possibly a headset. Finding long reach brakes isn't a big deal as Tektro makes some that are very long reach and quite inexpensive. And of course, most but not all of the vintage mtb's had the extra long chainstays that would fit the back tire. It's an interesting concept but I guess I don't see the big advantage over just getting a beater mtb and some 26" slicks.

That said, I really do dig your bike. I might have to give it a go just to try it out. :beer: