4.25'' - Weight: 330g - appropriate for infant and kid boards!
4.5'' - Weight: 340g - appropriate for (child) boards with a width from 7.00 up to 7.25 inch
5.0'' - Weight: 360g - appropriate for boards with a width from 7.375 up to 7.75 inch
5.85"- Weightt: 400g - made for boards with extra huge width!
Price is for ONE single truck!