Introducing the jet black whisperdrive ddm trainer app the jet black whisperdrive is a direct drive trainer with whisper quiet and smooth magnetic resistance and is the first to be compatible with both 12x142mm and qr135mmqr130mm axle systems the direct to drivetrain interface gives you the benefit of zero tyre wear and easy setup no more winding in of caps or lugs the jet black whisperdrivetm trainer has a rock solid design with the front legs positioned closer to your centre of body m