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27 inch Wheels?

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Old 03-29-18 | 10:05 AM
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27 inch Wheels?

I acquired a 1971 Gitane TdF with some nice Mavic G 40 wheels which I think can be salvaged. But....the rims have a sticker at reads "27x1 1/2". So, these are not 700c, correct? And may not work with a future (yet to be determined) frame?
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Old 03-29-18 | 10:16 AM
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Correct. They need 4mm more clearance than 700c wheels.
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Old 03-29-18 | 10:20 AM
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Current tire selection more limited in 630 (27") than 622 (700c)

8 is diameter difference, 4 is the radius difference..
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Old 03-29-18 | 10:21 AM
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Sure sounds like that would be 630 mm Bead Seat Diameter, as opposed to 622 mm BSD for 700C wheels.
Whether or not they’ll work in another frame/fork is anybody’s guess.
They’re unlikely to work in a frame/fork intended for 700C, narrow-tire wheels.
Might work in a fork/frame intended for 700C and mid-width tires.
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Old 03-29-18 | 10:39 AM
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What??? Only 2 wheels?
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Originally Posted by non-fixie
Correct. They need 4mm more clearance than 700c wheels.
And though it should be obvious from the other posts here already, I'll mention that they need different tires.
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Old 03-29-18 | 08:29 PM
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G40's are traditional skinny clincher rims, so slightly less than the 13mm inside width of the later MA40.
These are not the easiest rims to mount tires on!
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