Radar Astro Ski TubeRadar Astro Ski Tube The Astro is built for riders who want a tube that's easy to handle without sacrificing fun. Its compact size makes it simple to launch from the wake and maneuver through turns, making it ideal for beginners learning the basics or intermediate riders who value control and responsiveness. If you're towing behind a smaller boat or prefer a tube that won't fight you on the rope, this is your match. Two deck options let you choose