Has anyone ever swapped out the tires on the 50X from the stock dual purpose tread to a street only tread? If so, have you noticed a difference in performance and speed? The dual purpose tires are nice, but I rarely do any dirt or off road, and they do hum quite a bit on your smoother asphalt. Was wondering if anyone made the switch to a road tire if they noticed a slight increase in speed or any other performance differences