I was looking at my old lotus excelle today and realized it had old 27" style wheels, and not 700C. How would the best way to get fenders on this bike? It does not have cantilevers (standard style road brakes), and there isnt too much clearance (tires are fairly fat). I thought about 650B tire conversion, but I like the feel of extra large wheels at high speed.
The figure I've seen/heard is that you should have 10mm clearance between fender and tire; that's mostly so that sticks and whatnot that get taken up in your fenders don't snap the things off. Most of my bikes have fenders, and many have less clearance than that.