For a lot of racers it is track specific. I run a KSG GEN2 and I run it long everywhere I go with 1/4 deg rear steer and it does well. The reason I decided to run it long was more for the fit between the body and the chassis. Many racers feel that the short wheelbase works better on short tracks and that the longer wheelbase offers more stability with the higher speeds associated with larger tracks.
Clifford V. Kline
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