Cybex 750T makes hard noise on certain speed
I have this treadmill like 2 years, and in the last time when i set speed on 10km/h it start making so much noise like some vibration noise that it’s not small and not usual for treadmill, i opened and clean everything but i can’t see what can be the problem the sound is knocking just between 10km/h and 10.5km/h the belt is looking fine i dont know what can be the problem
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