This product is also available in the following styles: 26T, 19T, 31T, 21T, 12T, 22T, 24T, 14T, 29T, 35T and 16T.Traxxas 48 Pinion Gears are a great option for fine tuning the gearing of your 1/10 scale model. These gears feature a 3.17mm bore for fitment with motor shafts 3.17mm in diameter.