With fall in the air I have observed alot of sticks where I live falling from the trees. I have seen pics. of crushed front fenders resulting in riders being launched over the handlebars from running over sticks . If a large stick pops up from rolling over and doesn't snap, it can become wedged between tire and fender collapsing fender into head stock and possibly locking up front wheel at speed. I love my city kit fenders on my Stromer , but they also carry extra resposibility for safe riding. Ride safe out there.