The wheels are optional? I hope they aren’t too expensive…the last time I heard about optional wheels it was Apple’s Mac Pro. Their wheels are $699 a set. Someone did an unboxing that might explain why they’re so expensive. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-QpEZFp_IZJs.html