The Magnetic 3. 0 Trainer is pretty similar to the previous trainers in Kinetic's Magnetic series. And that's great, because the simple, durable, and affordable trainers are some of the world's most popular for a reason. They're quiet as mice, easy to set up, fold flat for easy storage, and come fully assembled, so all you need to do is mount your bike up and go. Or stay, as it were. By itself, that's almost enough for the Magnetic to sell itself, but the 3. 0 sports a few upgrades from previous models to make your rides even more enjoyable (or less unenjoyable, if you prefer). First and foremost is the thumb lever that lets you choose between nine levels of progressive resistance, all the way up to 40mph (the Magnetic 3. 0 offers greater resistance in the middle of the range, making it great for mountain, cyclocross, and gravel bikes, or anyone who rarely ventures past 32mph). It's built from rugged aluminum to avoid durability issues, and fits easily into a closet when you're not chasing some imaginary leader up a simulated Alp.