SIZING (ROAD BIKES)
|5’5″ to 5’7″||20 to 21 inch|
|5’7″ to 5’9″||21 to 22 inch|
|5’9″ to 5’11”||22 to 23 inch|
|5’11” to 6’1″||23 to 24 inch|
What size is a 21 inch frame bike?
A 21 inch bike frame is an XXL size suitable for people over 6 foot 2 inches tall.
Is 20 inch bike for adults?
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.
Can a 4 year old ride a 20 inch bike?
The best size bike for a 4-year-old is either a 12-inch or 16-inch wheel, depending on their height. Similarly, the right size bike for a 5-year-old falls into that same range. Most 8 and 9-year-olds will fit on a 20-inch wheel bike. Meanwhile, a 10-year-old (or older) will likely use the 24-inch size.
How do I determine bike 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.