Spirit XBU55 Upright BikeDurable, comfortable, and smooth are all qualities of the XBU55 fitness bike. Easy adjustments, a cooling fan, high density foam seat, challenging programs, 20 levels of resistance, and a bright LCD display are all standard. Indoor exercise bikes have been around for many decades. Their appeal and effectiveness have stood the test of time. Comfort, convenience, familiarity, enjoyment, and medical conditions are a few reasons this modality appeals to a