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700c wheels on MTB frame?

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700c wheels on MTB frame?

Old 05-09-11, 11:46 AM
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700c wheels on MTB frame?

I have aquired a Diamondback Sorrento MTB recently for next to nothing. I have been thinking of swapping out the wheels from the 26" to the 700c from a road bike. I do my riding only on flat surface. I wanted to know if I can get 700c wheels and fit road bike brakes on or is it more involved than that? Will the hubs on the road bike's 700c wheels fit a MTB frame? I know that the V-Brakes will not work. Lately I have been really digging the deep V rims and I wanted a set to put on my MTB.
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Old 05-09-11, 02:22 PM
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Not going to happen.

700C wheels have a larger diameter, which means the V-brakes on your bike will not be in the right position to work with 700C wheels. It also means the diameter of the wheel will be too large to fit into your fork or frame stays (they are shorter for fitting 26-inch-diameter wheels).

Road bike caliper brakes are mounted using a single centerline bolt hole (recessed on one side) built into the frame and fork. I don't think your MTB frame has that.

Plus your brake levers probably won't work with caliper brakes, which has shorter cable pull than V-brakes.
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Old 05-09-11, 02:27 PM
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I assume you just want faster tires? Just put 1.0 x 26 slicks on the mountain rims, a very cheap solution. The 1.0 are about the same width as a 25cm that would go on a 700c wheel.
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Old 05-09-11, 02:36 PM
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I put City Wolf 26 x 1.5s on one of mine and love the ride. No need to change anything else out.
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Old 05-09-11, 02:48 PM
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Weeell...

If you only have V-brake bosses on the frame/fork, your only option would be Mavic Speedcity adaptors. These plug into the bosses of 26"-specific frames/forks, and present an elevated set of bosses, so you can use V-brakes with 700c wheels. Something like this: https://www.bike-mailorder.de/shop/MT...MTB::5604.html

In the case you have a disc-ready frame and fork, just check for clearance and you might be able to squeeze 700x35-40mm tires in there. I've got a modern aluminium MTB frame and rigid fork that take 700x38 with room to spare.
Nothing new, Cannondale Bad Boy users have been doing it for years.

Keep in mind that modern rear hubs are:
130mm-spaced for road.
135mm-spaced for MTB/trekking...

Last edited by fatsoforgotso; 05-09-11 at 02:52 PM.
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Old 05-09-11, 03:13 PM
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Thanks for all the info, I do have a centerline bolt on both the fork and the rear and it seems like there is a lot more room to fit in a larger diameter wheel. As for the hub spacing, Can I use some sort of spacers? My frame and fork is disc ready as I see holes in it to mount the brake caliper but I am assuming this is going to cost a pretty penny.

I will also look into road slicks for my 26"

Last edited by nine9six; 05-09-11 at 03:19 PM.
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Old 05-09-11, 03:26 PM
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Originally Posted by nine9six
Thanks for all the info, I do have a centerline bolt on both the fork and the rear and it seems like there is a lot more room to fit in a larger diameter wheel. As for the hub spacing, Can I use some sort of spacers? My frame and fork is disc ready as I see holes in it to mount the brake caliper but I am assuming this is going to cost a pretty penny.

I will also look into road slicks for my 26"
If you want a really cheap experiment, try Nashbar's 26 x 1.25 slicks (they're like $10 each and really fast) .. after riding those, I'd bet you won't go back to thinking about the 700c conversion --- and if even if you do, you're only out $20.
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Old 05-09-11, 03:34 PM
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Originally Posted by fatsoforgotso
Keep in mind that modern rear hubs are:
130mm-spaced for road.
135mm-spaced for MTB/trekking...
Thanks! I didn't know that.
Now I suddenly see the light in why my roadwheels always were a bit tight on my trekking frame and they suddenly fit perfectly on my new TT bike
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Old 05-09-11, 08:15 PM
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Clearance is not a issue going up to 35c cyclocross tires so 23's are easy. If you can mount disc brakes thats the best option and use 29er MTB wheels with a internal rim width of 23mm.
It all fits together with no mods or problems.
[IMG][/IMG]
[IMG][/IMG]
Sorry but could not resist the chance to feature my bike again.
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Old 05-09-11, 10:26 PM
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Originally Posted by jbchybridrider
Clearance is not a issue going up to 35c cyclocross tires so 23's are easy. If you can mount disc brakes thats the best option and use 29er MTB wheels with a internal rim width of 23mm.
It all fits together with no mods or problems.
[IMG][/IMG]...
Sadly mine has less clearance than a Myer Boxing Day Sale with just 28s mounted.
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Old 05-10-11, 01:30 AM
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Originally Posted by jbchybridrider
Clearance is not a issue going up to 35c cyclocross tires so 23's are easy.
You should see the minuscule clearance on my new bike ... with 23 clinchers I have about 2 millimeters :$
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Old 05-10-11, 07:37 AM
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Originally Posted by AdelaaR
You should see the minuscule clearance on my new bike ... with 23 clinchers I have about 2 millimeters :$
Go with 20mm
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Old 05-10-11, 08:22 AM
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Nice bike JBC! I am really diggin those big wheels!
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Old 05-10-11, 10:12 AM
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I think my scott P1 would have less clearance with the width at the chain stays as well but I think it would still just take a 35C, it came stock with 28's but I'm sure any modern MTB frame would have the same clearance as mine.
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Old 05-10-11, 10:21 AM
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I just googled Diamondback Sorrento, the tires look pretty fat in the pic's but they describe it as a mountain/path frame with no spec's so its up to you nine9six to get the ruler out and compare yours to other MTB frames.
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