Just got a 2014 Spyder RTS It has 175X55 tires on it that look ok. I can't keep this thing on the road. The center line passing a slow car it heads for the ditch. On a normal road if the road has cress in it.it either heads towad on coming traffic or toward the ditch. On RT-40 last night from Daytona I couldn't go over 50 MPH it was a hand full keeping it on the road dipping and diving to the left and to the right. Help.