I have 55mm Big Apples on 25mm rims and they actually measure 54mm with a digital caliper. I've read many times that the 50's actually measure in the 45'ish mm range but I have no direct experience. My 50mm Schwalbe Marathon Supremes measured out at 45mm but that's not a balloon tire so it might not be comparable. I haven't measured my 60mm BA's but they look like a freaking motorcycle tire on my bike.
I love the Big Apples for utility and recreational riding. I wouldn't recommend them if you plan to ride long distances or with a group but for just getting on your bike and riding for fun, BA's are hard to beat.
Last edited by corwin1968; 08-09-16 at 01:08 PM.