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The direct drive style trainer is the professional choice for trainers due to the consistent action and direct input of the drivetrain being directly hooked into the trainers system. Direct drive trainers also eliminate tire contact and perfectly replicates outdoor riding simulation, including elevation grades up to 20%. It is compatible with 3rd party apps via ANT FE-C direct control for app modes and ergo mode, as well as Bluetooth 4.0. The "road feel" is largely considered the best of direct drive units, and you get decades of CycleOp's Power Tuning experience in creating the power curve and responses.

The Hammer offers high quality construction and a clever design which is PowerTuned (using PowerTap technology) for accurate power readings. This means there is no guess work for your output in your training sessions. The Hammer is fairly quiet direct drive trainer, offering 64dB at 20mph, which would roughly equate to a very quiet dishwasher during cycle. The 20lbs precision balanced flywheel is partly responsible for the low volume, and further enhances the workout by serving up real world inertia. The flywheel is paired with the Hammer's rapid response electromagnetic resistance system that will cover large resistance changes in a short amount of time. CycleOps was smart enough to make the Hammer compatible with all axle configurations for proper interface and mounting of any bike. The sturdy arms are the final word in stability and have threaded leveling feet which further stabilize the Hammer unit.