THis is a dumb question, but I am so paranoid about hurting my bike. I found a series of dirt roads in a state park that are hard packed with dirt and rock . It has ruts in it throughout the road from being packed in different ways from washouts.... Can I hurt the bike by going to fast over these ruts at 40 miles per hour? The bike seems to handle it fine but I know nothing about off roading. I know these bikes are made for off road, but am I going to hurt the suspension or anything from the really bumpy ride?