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28"?

Old 03-18-09, 04:24 PM
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28"?

Pardon my ignorance, but 28" is not a wheel size one often sees. Does it equate to 700C?

https://www.bonthronebikes.co.uk/32-629296
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Old 03-18-09, 04:25 PM
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That's odd. 700c wheels are smaller (not a LOT smaller, but they are smaller) than 27" wheels, so it does not make sense to list them as 28" if that is indeed what they are.
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Old 03-18-09, 04:29 PM
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Sheldon sez 28" = 635mm rim diameter (vs 622mm for 700c, 630mm for 27")

https://www.sheldonbrown.com/harris/tires/index.html
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Old 03-18-09, 04:33 PM
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Bike is advertised as coming with Schwalbe Marathon Racer tires, which come in 26 or 700.

https://www.schwalbetires.com/marathon_racer

Does that mean for Cannondale 28" does in fact = 700?
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Old 03-18-09, 05:46 PM
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It depends on the context. In the European mtb community, I believe 28" does in fact refer to 622 (700c). The 635 size is apparently still used, and ALSO still called 28" but mostly on nonexport Asian bikes- used to be more common. And yes, I find it wierd (or even "stupid") that 27 is more than 28, but hey- what can ya do? Also note that in the US mtb community, 622 is often refered to as 29" and is still smaller than 635/28.
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Old 03-18-09, 06:00 PM
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Oh 'eck ......

Now it's as clear as mud!
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Old 03-18-09, 06:28 PM
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To further confuse-- 700c Tubular (sew-up) tires are sometimes labeled 28." IIRC some of my Continental's are labeled 28 x 1".
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Old 03-18-09, 06:30 PM
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What follows is just my opinion left wide open for correction.

Looking at the Cannondale specs I think that they are describing the diameter of a 700c rim with tire making a 28 inch wheel size. I have never seen any Schwalbe tires in a specific 28 inch rim size.

I have been using 700c rims with Marathon XR 700x45 tires that measures 28 inches in diameter. My Bruce Gordon RNR from 1989 fits the 28er size but not the 29er tires available today.
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Old 03-18-09, 06:33 PM
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I wrote to bonthronebikes to see if they can give a definitive answer (probably easier than getting an answer from Cannondale).
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Old 03-18-09, 07:36 PM
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Originally Posted by arctos
I have never seen any Schwalbe tires in a specific 28 inch rim size.
Check out these 28x2.0 marathon supremes:

https://www.chainreactioncycles.com/M...?ModelID=24539

(vs the 700x35 or 40s)
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Old 03-18-09, 08:01 PM
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Originally Posted by HardyWeinberg
Sheldon sez 28" = 635mm rim diameter (vs 622mm for 700c, 630mm for 27")

https://www.sheldonbrown.com/harris/tires/index.html
If you follow the link to the 700c page, you will see that in Northern Europe, 700c is often called 28".
Originally Posted by Sheldon Brown (pbuh)
In northern Europe this size is also sometimes called "28 inch" in Northern Europe and Canada (F.13), but should not be confused with the 28 x 1 1/2 635 mm size.
https://www.sheldonbrown.com/harris/tires/622.html
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Old 03-19-09, 01:56 AM
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Sheldon really pushed for universal ISO designation. It isn't hard to see why when you see the same size given so many different names depending on the context.
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Old 03-19-09, 02:09 AM
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I have a pair of 11 year old 28" Conti Top Tourers on some 700C rims.
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Old 03-19-09, 04:37 AM
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There is a 28" wheel size (635 mm as stated above) but as also stated above unfortunately a few uk bike shops do refer to 700c rims with big tyres as 28", it's the same logic as 29er naming convention, but it is confusing and silly.

I ve had several difference of opinions with people over the fact that a 650c tyre is not a 26" tyre as in a mtb (559 mm).

Bike "standards" are a joke, look at the different 1" headsets sizes and crown races.
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Old 03-19-09, 05:15 AM
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I can confirm that in northern Europe, a LOT of people refer to what I would call 700c tires as 28". I'm sure no system is better than another, after all shouldn't we more accurately call them all 622's instead of 700's? Even so, it does amuse me that the metric-dominated Europeans call them 28" while the imperial-dominated North Americans call them 700mm.
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Old 03-19-09, 05:55 AM
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We call them 700c, not 700mm. What Sheldon advocated and what really is the better system is to call them by their ISO. Which, as you said, is 622. And that's mm.
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