I am having a problem with my tyre choices. I have been racing 2 degrees jaco nitro shoes and worked very well. I am using 190mm bodies and always have to cut my wheel arches very high up on the fender line.However,that create a lot of drag(turbulance) inside my body. I changed to 0 offset and now I cannot keep the car on the track. I am riding outdoor asphalt and racing a Yokomo BD. My shock oils is 40(front) and 30(rear) I am using the standard Yokomo spring set up.Is there anybody that can help me with a better solution, please?