The Minoura LR961 Mag Turbo Trainer uses two Neodymium magnets to give you a wider power range an more resistance levels. You can use the handlebar mounted switch to change between 13 different levels of resistance so you can vary your workout. The LR961 also comes with the ability to easily switch between a self-weighted gravity mode & a fixed pressure mode. In fixed pressure mode the tyre is securely clamped against the roller which is great for high power training. In gravity mode the tyre & roller contact has some float in it which gives a more natural feeling ride. Although the Minoura LR961 is not a ‘smart trainer’ it can be linked to training apps like Zwift using a compatible speed & cadence sensor (sold separately). This will send data up to your virtual training software to record your efforts but not send anything back in return. Features dual neodymium magnets super quiet & ultra-smooth generates 829 watt power at 40km/h (h range) 35% stronger & 2 x resistance range than v-series 7 kgs virtual flywheel weight 13 resistance levels quick release remote shifter allows high-speed / low-resistance training new sw frame: gravity mode: 1.1 vertical flywheel provides a natural ride. Fixed mode: for training & interval ridding 100% assembled, ready to ride in minutes compatible with livetraining, kinomap & zwift (when using compatible speed/cadence sensors) made in japan