how to measure a bike frame? tires? what?

Kotarou

well i know sounds stupid, but i never thought about it. how do you measure a bike. i been at luigis 1 day a week for 3 weeks. and i finnally saved up enough points for a bike. anyways all it says mtb bike. guess it doesnt have a specific brand name nor measurements or anything. so i was wondering how do you measure it. its definatly a kids. but not little kids. so how do i measure a bike?

Answer
Bike frames are generally measured from the bottom bracket (center of the crank) to the top of the seatpost tube. But it's more complicated than that. The smaller the rider, the shorter the top tube must also be. For taller riders - the top tube must be longer. All adult bikes (anyone over 4' 10" tall) are measured by frame size only. Toss wheel size out of your head. See links below.

Read the ENTIRE article on last link.

what size bmx bike should a person get if there are 5 foot?

Idi M

Answer
Make sure it's a professional BMX bike.
There are many bikes with 20 inch wheels, but some of them are made for little kids.
Check the wheelbase- the axle to axle measurement should be 36 inches. A child's BMX bike will only be 31 inches axle to axle (wheelbase).

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Title Post: how to measure a bike frame? tires? what?
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