Winegard Antenna for Caravan: What Travellers Should Know A wind-up lowers when you're parked or driving, which protects it on low-clearance roads. A fixed mount stays up permanently and can't be lowered. Think about where you travel and how much roof clearance you have. https://www.ganjingworld.com/article/1ive0rra8f818qhgIhYuO5bcx1ll1c