World exclusive rim drive system Magnetic resistance unit 800 gram machined flywheel Ergo type frame The standard tire drive system trainer must contact the tire surface and it will cause heavy noise and vibration when using a MTB's knobby tire.It's very uncomfortable for both the user and neighbors. The only one effective solution to avoid this problem is replacing the rear tire with a slick one. A rim drive system is completely different from a standard tire drive trainer.
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