Originally Posted by howardcano

I usually adjust for a minimum turning circle of about 4 feet for an indoor carpet track, and a somewhat larger circle for a large outdoor track. If I feel I need a tighter circle, then I adjust the car for more front grip, not more steering lock.

It's a good idea to always specify the amount of steering by the turning circle diameter, since due to differences in servos, steering knuckles, and (most of all) radios, stating a percentage of throw on the transmitter won't translate to a different car/servo/transmitter.