Center One-Way Pulley Set 18t Ta06 made by Tamiya
By installing this Center One-Way Pulley onto your TA-06 chassis, the default full-time 4WD setup becomes a part-time 4WD setup. Braking forces are applied to the rear wheels only, shifting the machine's handling characteristics toward over-steering, which is more suitable for technical courses. This item is not recommended in R/C race tracks that have heavy braking areas as the car will tend to over steer or spin out.