Trainers
From Virtual Cycling Wiki
The i-Magic trainer was the precursor to the Fortius, it is recognisable by it's Green hardware. It has the ability to simulate only up to 5% climbs but it is a mature system and generally less problems associated with it than the newer Fortius hardware.
The Fortius trainer has been around for a few years, it is recognisable by it's Blue hardware. It has the ability to simulate up to 20% climbs and is able to 'drive' the back wheel without pedalling downhill. The unit is more prone to problems with the hardware and the firmware. If you are thinking of buying a Fortius make sure you visit the Tacx Forum and read about the communities experiences regarding the trainer and the current problems.
Riders View - The two trainers have a diferrent feel when riding them, the i-Magic can reach higher speeds downhill than the Fortius. The Fortius has more inertia, takes longer to accelerate and simulates riding a real bicycle more closely. The Fortius is slower than the i-Magic in league races when used by the same rider.
[edit] Links
Tacx iMagic & Fortius Trainers
