I forgot some folks do run in muddy conditions. Sorry. My harvest weather is hot and sunny, so it does collect some dust. But it likely would collect some mud if you had to run in muddy conditions. But then, I guess when you turn the rear tires would throw mud up on the rearward mounted box too would'nt it? I like the location behind the tire myself. I think it works well for getting to the feederhouse and the concaves.