Inspirational 39++ 26In Bike Tires. There are 11,255 suppliers who sells 26 in bike tire on alibaba.com, mainly located in asia. Select the department you want to search in. But in terms of 27.5 x 3.8″ and the larger 26″ fat bike tires, they are pretty close in diameter. To make matters worse, in the early days of cycling, every country that manufactured bicycles narrow 571 mm tires, commonly called 650c (or incorrectly called 650 without a letter) or 26 x 1 are used mainly on racing type bikes for smaller.