Best Answer:Hi! 14mm is normal for BMX bike.... and 3/8th is kinda normal for BMX bikes. This Sapient Wheel will obviously be a 3/8.... that is what Sapient uses on many of their bikes. What type of wallie world bike are you trying to match?
its not a walmart bike i have a bmx bike thats a bunch of spare parts thrown together but it needs a new back wheel and all the wheels i see have to large of a back axle i need a back axle the same size as most if not all bmx front axles