CNC machined aluminum wheel hub anodized. 
Very light weight and versatile design. 
2.25" wheels have rubber layer sandwiched between light foam to maintain its shape under load. 
Very Cool Big 8 Spoke Rim.
Rim Material: Aluminum
Colour: Brushed Silver or Titanium color 
Outer Diameter: 57mm/2.25"
Rim Diameter: 44mm/1.73"
Width: 16mm/0.63"
Weight: 18g/piece
Including two bushings internal diameter: 4mm, suitable for 4mm wheel axle.
 
Note: The wheels are in stock in US warehouse now, you can choose US warehouse shipping.