Another 30++ 700 X 23 Bike Tires. Shop the top 25 most popular tires 700x23c. You'll receive email and feed alerts when new items arrive. Continental ultra gatorskin folding bike tire 700 x 23c. This bike tire features a dynamic tread pattern design. 700 X 23 Bike Tires - Panaracer Gravel King 700 X 23 26 28 Or 32 Folding Road Bike Tire Gravelking Sporting Goods Tires Romeinformation It The first number, 700, refers to the nominal diameter of the bike tire and is measured using millimeters.