Overview Reviews Product Description 86031 Differential Main Gear (39 Teeth) and Pin (2.5x22mm) for HSP 1/16 Scale Product Videos Custom Field Product Reviews Write a Review Write a Review × HSP 86031 Differential Main Gear (39T) and Pin HSP 1/16 Scale Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *