Nope. I bought - and then passed along - a too-tall-for-me Miyata 1000, and already have a '84 Univega Gran Tourismo (pretty much equivalent to a Miyata 610). Both have 27" wheels and canti brakes. Two of my other three road bikes also roll on 27" wheels. So am I afraid of 27s? Nope. In fact, I only have one road bike with 700c, and I have 'wide' 28s on that one.