About the Saris Basic Mag Trainer Whether you're training for a local charity ride or working to beat your friend's Fit Bit score, the Mag indoor bike trainer can help you make it happen. Simply connect the trainer to the rear wheel of your bike, hop on and pedal away. Plus, the Mag comes with five adjustable levels of resistance so you can adapt every ride to your liking. Key Features Magnetic resistance unit provides a quiet and frictionless ride. Linear resistance boosts workout intensity to match each pedal stroke and gear click. Eccentric levelling feet allow for easy adjustment on uneven surfaces. Comes on a sturdy, foldable frame. Adjust tyre fit to resistant unit with a convenient turn knob. About the Brand In 1989 Chris and Sara Fortune purchased then-named Graber Products with a mission to manufacture the highest quality bike racks right here in Madison, Wisconsin. This dedication to Made in the USA manufacturing and sourcing is at the heart of our business. With the vast majority of raw materials sourced within just 300 miles of our Saris Cycling Group headquarters, combined with our just in time manufacturing process has allowed American manufacturing to be both possible and profitable.