Memorial day deals: refurbished KS4 Pro at $399.99
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After about 1,500 miles on my S2Pro, I needed a new rear wheel.
It was sent to me quite fast and easy to install.
Hiboy S2 Pro/KS4 Pro Rear Wheel
I started to experience a grinding noise with the new rear wheel after about 20 miles of use. It sounds like a bad bearing but I have no clue if they use bearings in these things.