Bearing No. Inner Outer Width W Radium Basic Load D D Open Shielded/Sealed Rating KN Mm inch mm inch mm inch mm inch mm inch Dynamic C Static C0
R144 3.175.1250 6.350.2500 2.2380.0937 2.779.1094 0.10.0039
R2 3.175.1250 9.525.3750 3.967.1562 3.967.1562 0.30.0118
R2A 3.175.1250 12.700.5000 4.366.1719 4.366.1719 0.30.0118
R155 3.967.1562 7.938.3125 2.779.1094 3.175.1250 0.10.0039
R156 4.763.1875 7.938.3125 2.78.1094 3.18.1250 0.1.004 0.395 0.143
R166 4.763.1875 9.525.3750 3.18.1250 3.18.1250 0.1.004 0.71 0.268
R3 4.763.1875 12.700.5000 3.97.1562 4.98.1960 0.15.006 1.31 0.49
R3A 4.763.1875 12.700.5000 4.98.1960 4.98.1960 0.15.006 1.31 0.49
R168 6.350.2500 9.525.3750 3.18.1250 3.18.1250 0.1.004 0.268 0.136
R188 6.350.2500 12.700.5000 3.18.1250 4.76.1875 0.15.006 0.83 0.37
R4 6.350.2500 15.875.6250 4.98.1960 4.98.1960 0.2.008 1.48 0.615
R4A 6.350.2500 19.050.7500 5.56.2188 7.14.2812 0.3.012 2.34 0.885
R6 9.525.3750 22.225.8750 5.56.2188 7.14.2812 0.3.012 3.3 1.4
R8 12.700.5000 28.575.1250 6.35.2500 7.94.3125 0.3.012 3.912 2.245
Ball Bearing Skateboard Bearing