What does 26 inch mean for bikes?

And what does it mean when they say “26 inch”? A 26 inch mountain bike means that the wheels have an internal diameter of 26 inches. For example, a man who stands 5’8″ would be best suited for a 20-inch frame with 700c wheels or larger (700c refers to the diameter of the wheel).

Can adults ride 20-inch bikes?

Adults can definitely ride 20-inch BMX bikes, but it is recommended that they wear appropriate safety gear to keep themselves safe. This type of bike can be more difficult for adults than other types of bikes because the smaller wheels require a lot more balance and coordination in order to ride safely.