Tacx Blue Twist Magnetic Resistance Trainer / Spinner T268 Was $250 retail $150 ********** Resistance unit Magnetic Braking positions 7 Descent simulation – N/A Max brake power (10 sec.) 700 Watt Sprint power (1 min.) 600 Watt Mass inertia 8 kg 1 Suitable for all bikes, if necessary with axle skewers or nuts Wheeldiameter 26″- 29″ and 700c 2.64 lb (1.2 kg) flywheel simulates the feel of riding outdoors Manually controlled trainer features seven resistance levels wit maximum power of 700 watts, does not have a handlebar resistance lever. You manually set the resistance, selecting one of the seven positions using a switch on the brake Wheel diameter 26″- 29″ and 700cc Blue Twist features a sturdy roll core with soft plastic to absorb vibrations. This dramatically reduces noise, so you can ride without disturbing others nearby.