In an effort to further optimize the Associated B4.2, T4.2 and SC10.2, AVID has developed the Associated Motor Centering Set. These vehicles are all heavy on the left rear, which also makes an imbalance on the front tires. By shifting the motor, motorplate, and slipper 5mm towards the right, the balance is restored close to 50/50. Re-balancing the rear end weight also affects the front tire weights, and with the entire package back to equilibrium, you get a car that turns more predictably left and right. On the track, the car feels like it rotates faster and more evenly through both left and right turns. Stock racers will love the 6.7g savings in rotating mass!