Elite Drivo II OTS+ Turbo Trainer The Drivo II's massive mag resistance unit can generate over 3,600 Watts at 60 kmph The 6 KG internal flywheel is geared up for high RPM's, generating a smoother feel Connects to your computer or wireless device by either ANT+ or Bluetooth Smart Redesigned legs provide a wider stance and greater stability but still fold away for easy storage Comes with 9/10/11 speed compatible Shimano freehub, Campag users will require adaptor TT14233 Compatible with 130 and 135 Q/R rear ends, as well as 142 x 12 thru-axles Includes a 3-year subscription to Elite's My E-training app Elite’s flagship Elite Drivo II OTS+ Turbo Trainer features a whole host of new improvements from the original, including a new Optical Torque System that records your power meter data to within 0.5%. Its upgraded resistance hardware now makes it one of the fastest responding trainers on the market and ideal for virtual racing software such as Zwift. All Drivos are extensively tested and calibrated before shipping using an Lorenz industrial torque meter, once calibrated an occasional software-based recalibration is all that's required, no sending your trainer back for recalibration