The Tacx Galaxia Rollers take you as close as possible to the natural road cycling experience. They have a state of the art design, and thanks to conical rollers your ride is extra stable. That means you can focus even more on your goals, like improving your fitness, pedal stroke and maintaining your speed. Do sprints; or stand on the pedals without fear of falling. You aren't constrained on the Galaxia the way you are on other trainers. Accelerate, and the Galaxia rollers move forward as a result of the kinetic energy that's created; they move backwards when you slow down. This the Tacx patented 'swing system' that enables you to work on speed and suppleness.Features: Minimalist, compact design Adjustable frame is sturdy, yet lightweight Accommodates a wide range of bike sizes Most realistic ride feel indoors Heavy-duty rollers with sealed bearings for a smooth, efficient pedaling motion Collapsible for easy storage and transport Compatible with road and mountain bikes