How do you check frame size?
Place the end of a tape measure at the exact center point of the gear crank (the metal post that runs through the center of the bike’s chain sprocket). Then run the tape measure up to the top of the tube. Measure to the point where the tube ends. This will give you the length of the seat tube which is the frame size.
What height is a 26 inch bike for?
Bikes with 26-inch wheels are designed for people 5’0 to 5’5. If you are taller than that, you should look for a bike with 700c, 27.5-inch or 29-inch wheels.
What size person will an 18 inch frame bicycle fit?
In very general terms, an 18-inch bicycle is best for someone just under six feet in height, but factors like inseam length and the differences between bike manufacturers can all influence the fit.