Get the most out of your indoor training miles with the Kinetic Fluid Trainer Road Machine Smart with InRide Sensor. With Kinetic's tried and true Road Machine Fluid Trainer and inRide sensor technology, this trainer lets you smoothly tick off the miles with a heap of data tracking and workout planning options. Kinetic's Road Resistance Unit is a revolutionary piece of engineering. The roller is made of stainless steel and is 2. 5in 6. 35cm in diameter, which is a good bit larger than much of the competition. The larger roller means less wear on your tire and a reduction in the temperature of the spinning elements. It's mated to a 6. 25lb 2. 84kg flywheel, the heaviest around, which gives the satisfying feeling of momentum when you're spinning up to speed, holding speed, and slowing down. On the left side is a unique two part resistance unit, which is the heart of their system. Of course, this system builds heat as your ride your energy has to go somewhere in this case friction. However, the fluid acts as a coolant and the chamber has 80 cooling fins on the outside that act like radiator fins. It's impossible to overheat the chamber or reach a point where performance is diminished. The silicone fluid retains its physical properties, even up to the normal operating temperature of 325 degrees Fahrenheit when riding 25mph, resulting in a consistent, road like power curve that increases as your speed increases. To give you an example, it takes 143w to ride at 15mph, 258w at 20mph, and 25mph will take 430 watts. Kinetic pairs the Road Machine with its inRide sensor technology, which allows the trainer to connect to your favorite device via Bluetooth Smart functionality to track your ride without any additional sensors. The inRide app not only lets you see ride data and metrics, but also features built in workouts, individualized target zones, and the ability to upload ride data for analysis. For the Road Machine Fluid Trainer, the Road Resistance Unit is a...