A Bicycle Trainer for All Seasons. Stick to your fitness plan year-round with the help of the Saris Mag+ indoor bike trainer stand (9902T). This bike trainer stand for indoor riding is the perfect way to keep your legs warm when it's cold, dry when it's wet, and safe when it's too dark to ride outside. With this turbo magnetic bike trainer, it's easy to turn your bike into your go-to calorie burner — no matter the season. Simply attach the handlebar-mounted shifter to the bicycle trainer stand to change resistance during your workout without having to leave your bike. Want to train with the apps: Zwift or Rouvy? All you need is a speed sensor. Visit our setup guide to learn how to get started. Do you own an older Mag indoor bicycle trainer exercise stand and want to add the remote shifter? Purchase the standalone Mag+ Magnetic Remote Shifter #9903.