This easy to install front wheel unit transforms your Quinny Buzz Xtra or Buzz 3-wheeler into the 4-wheel pushchair of your dreams. Just remove the front swivel wheel from the pushchair by pushing both release buttons and pulling the front fork out of the tube on the Quinny Buzz Xtra frame. Insert the new Buzz 4-Front Wheel Unit into the tube until it clicks into place. Compatible with quinny buzz xtra and buzz pushchair. Transforms your quinny pushchair into a 4-wheeler. Easy to install. Lockable swivel wheels. General information: Size H26.5, W34.7, D40cm. Manufacturers 2 year guarantee.