Tacx Sirius Soft Gel Folding Magnetic Cycle Trainer
Details from the Tacx Website:
The Sirius is a striking cycle trainer with an ergonomically shaped frame that gives slightly as you cycle. The magnetic brake consists of two discs, each of which has six permanent magnets. The 10-setting remote resistance lever changes the position of the magnets in the brake unit relative to one another. In the course of training the power increases when you cycle faster and/or at a harder setting
The Sirius features a 2 kg balanced steel flywheel for a smooth pedalling action. The heavier the flywheel, the greater the mass moment of inertia.