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Can 26 inch wheels fit on a bike meant for 700c?

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Can 26 inch wheels fit on a bike meant for 700c?

Old 03-04-12, 10:41 PM
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Can 26 inch wheels fit on a bike meant for 700c?

I found a cheap bike frame intended for 700c.

Can I put my current 26 inch wheels on it?

Thanks
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Old 03-04-12, 10:43 PM
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You could, but it is almost certain that the brake pads will not reach the rim.
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Old 03-04-12, 11:01 PM
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+1

The main issue is brakes. I suppose if you had discs it might work, but then you'd have wheels that were much smaller than the frame was designed for and have a bottom bracket that would be very low, unless you ran large fat 26" tires which would probably not fit in the frame...
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Old 03-05-12, 12:34 AM
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+1 on the brakes. Do some measuring and mayyyyyybe these ones could work.

700x23 tires are about 26.3" diameter, so it's safe to say that a 26" tire will clear the fork crown and rear brake bridge. Your next hurdle is the fork and chainstay clearance...

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Old 03-05-12, 01:11 AM
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The smaller wheel will affect the "geometry of the bike, it will handle and steer very differently, often with disasterous results
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Old 03-05-12, 06:17 AM
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Originally Posted by ThermionicScott View Post
+1 on the brakes. Do some measuring and mayyyyyybe these ones could work.

700x23 tires are about 26.3" diameter, so it's safe to say that a 26" tire will clear the fork crown and rear brake bridge. Your next hurdle is the fork and chainstay clearance...

- Scott
700x23 is about the same as 26x2.1 in terms of diameter.
the problem is 700x23 is 23mm wide, while 26x2.1 is 54mm wide.
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Old 03-05-12, 07:19 AM
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Originally Posted by Fairmont View Post
I found a cheap bike frame intended for 700c.

Can I put my current 26 inch wheels on it?

Thanks
Not alot of info, but substituting 26" rims for 700 mm rims been done before. Rear drop out spacing and the rear axle width could be a major mismatch. If the frame is nice enough to build up, it maybe best to find a set of wheels that'll fit.

Brad
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Old 03-05-12, 07:44 AM
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WHY?
why not just buy the widest cyclocross tire that will fit in the 700 frame?
If it does it not come with wheels, most road bike enthusiats are more likely to upgrade wheels than anyone else in the sport. There has to be an old set of wheels nearby. I have two guys locally that have an entire garage full of old bikes they sell on kijiji. Usually they have spares.
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Old 03-05-12, 07:51 AM
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Everything on a bicycle works together. You can almost never change just one thing on a bike without having to modify something else to make it work. In your case you'll have brake reach issues for sure. Rear dropout differences and frame clearance issues are likely, and I wouldn't bet against some additional unforeseen problems.

My bet is it will be a lot easier to find a cheap 26" frame.
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Old 03-05-12, 08:33 AM
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Originally Posted by pat5319 View Post
The smaller wheel will affect the "geometry of the bike, it will handle and steer very differently, often with disasterous results
This is correct if the overall diameter is significantly different since the trail calculation includes the wheel's radius. However typical 26" MTB wheels (ISO 559) with 2.1" tires are almost the same overall diameter as 700c wheels with 23 mm tires so the geometry won't change much. If by "26 inch" the OP means 650c wheels and narrow tires then, yes, the geometry and bb clearance will change appreciably.
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Old 03-05-12, 11:06 AM
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yes, it can be done. i tried it once on an old lugged trek road bike.

problems that could not be addressed properly included, but were not limited to, a very low bottom bracket and excessive shaking when hands removed from bars. problems fixed included braking issues with the use of a coaster brake.

in my limited use (maybe 30 miles) i really didn't notice any handling issues other than the excessive shaking.

i guess it should be noted that the bike the wheels that were put on the trek came off an old gary fishier (97) MTB, that looks as though it could easily carry 700c wheels, although i haven't tried it. maybe some day...

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Old 03-05-12, 11:33 AM
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Originally Posted by pat5319 View Post
The smaller wheel will affect the "geometry of the bike, it will handle and steer very differently, often with disasterous results
Not necessarily, I managed to convert an old Raleigh (27 3/4" wheels if i remember correctly) to 700c. Then I put a 26" wheel on the front after the 700c one got trashed in an accident. I used drum brakes to get around the issue of brake reach, and the bike handled fine after the conversion, and also after the replacement of the front wheel. The tyres were about 30mm in all three setups.

That, however, was just my experience, other bikes may have different geometry.
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Old 03-05-12, 12:59 PM
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26" rims are slightly larger than 650b, so I don't see why brake reach would be an issue if you just used long reach calipers.

Hmmmmmmmmm, this is giving me ideas for my next winter bike. I've always wanted to go 650b, but didn't want to spend the money.
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Old 03-05-12, 01:03 PM
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26" rims are slightly larger than 650b
no, 584/650B is larger than 559/26"
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Old 03-05-12, 01:07 PM
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Originally Posted by fietsbob View Post
no, 584/650B is larger than 559/26"
I thought 26" was 590?

Edit: I see, I'm used to 26" road, not mountain.
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Old 03-05-12, 01:07 PM
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Originally Posted by ScottNotBombs View Post
26" rims are slightly larger than 650b, so I don't see why brake reach would be an issue if you just used long reach calipers.
Even on a standard road bike with short reach caliper brakes (40-50mm) the difference in radius between a 700c (622mm) and 26" MTB (559mm) is 31.5mm. So you're looking at ~72mm of reach. While brakes for this may exist, braking will suffer and it would really make more sense to just use 700c wheels. If the bike uses anything but the shortest reach calipers to begin with (as I did in my example) finding caliper brakes to work may be impossible.

Of course there's always the drop bolt... https://sheldonbrown.com/home-drop.html

Again, going through all these work-arounds, really better off just using the original wheel size.
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Old 03-05-12, 01:15 PM
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590.. You were thinking EA3 , British 3 speeds, which in French system is 650A.
[ref: Sutherland's]
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