Everyone knows the slower you go over the rocks the more control you have. If everything is blurry and you're bouncing over obstacles more than crawling then you're probably thinking about changing axle gears or swaping in a Atlas or Stak 4-speed transfer case? Or maybe your gearing is all good but now you're planning on upgrading to bigger tires. How are these upgrades going to change how you crawl? Use the calculator below to figure your crawl speed in feet per minute and inches per second. Crawl ratio is a good thing to know but crawl speed tells you how slooooow you will go. Enter the values on the left and press compute.