The ST4000 has at least 2 belts available. I tried the black one but the fibers in the contact area and the harder compound seem to be the reason for the slipping under higher loads.
The gray one is stickier and has a smoother contact area.
The ST4000 has at least 2 belts available. I tried the black one but the fibers in the contact area and the harder compound seem to be the reason for the slipping under higher loads.
The gray one is stickier and has a smoother contact area.