High quality NSK-RHP* bearings suitable for kart axle use. These axle bearings feature pressed steel dirt shields and grub screw threaded holes (screws sold separately).Available to suit different size go kart axles, covering most kart classes including:- Rotax, TKM, Prokart and CadetDimensions:Option 1* - 25mm bore, 52mm O/D, 31mm widthOption 2 - 30mm bore, 62mm O/D, 31.2mm widthOption 4 - 50mm bore, 90mm O/D, 43.5mm width* Standard type bearing (Non NSK)Sold individually.