How fast are you going at 13000 rpm in 6 th gear?

To calculate speed at 13,000 RPM in 6th gear, you need to know the gear ratio and the tire diameter. For example, if a motorcycle has a gear ratio of 1:1 in 6th gear and a tire diameter of 24 inches, the speed can be estimated using the formula: Speed (in mph) = (RPM × Tire Circumference × 60) / Gear Ratio. Assuming a typical tire circumference of 75.4 inches, you would be traveling at approximately 130 mph. Adjustments can be made based on the actual gear ratiOS and tire size of the vehicle.