Back in May we got hung up in some weather on Sam Rayburn, I did not stop to measure the rollers, but when we were in the bottom, I could not see over the next one. Probably 4 foot range, nasty. We got a little(lot)wet in my Z7, but after having it for over 2 years, I never felt uncomfortable, scared to death, but not uncomfortable! Took my time and got back to the ramp safely.