Originally Posted by
leed
27" wheels are slightly larger than 700C wheels, so if you're unlucky, chances are you'll need to get long reach calipers (Tektro makes these) Other than that, everything should be good to go. You can also look for a 27 fixed rear, which is attainable.
For example..
Here
Oh I thought 700c was larger than 27. I saw it here,
http://www.sheldonbrown.com/tire-sizing.html#iso and was confused by what it says for 622mm and 630mm because I if 622mm is 700c then of course that is smaller than 630mm, but then the traditional sizing for 622mm says it is 28xsomething, so 28 is larger than 27.. you see why I got confused?
Anyway, so you are saying that 700c wheels will fit on a vintage bike like mine, but I might have to replace the brake calipers? If that is all, then i should just buy a new wheelset I guess. And if what ianjk says is true, about 27" tires not being easy to come by, that's another reason to get 700c.