When only the best will do! Arrow Precision have made the best crankshaft money can buy for the Rover K16! Stroke: 89.30 Pin Diameter: 48.00 Pin Width: 22.75 Main Diameter: 47.98 Main Width: 24.58 C/Weight: 8 Bolt: 6 ARROWC125 Our own grade of low sulphur CORUS steel in EN40B (722M24) Fully machined Balanced between 2 and 15 grams (depending on the number of cylinders) 100% crack detection Certification – material, heat treatments, balancing, critical detail inspection report.