The stock Axial Yeti transmission internal ratio is: 1

Which allow the measurement from 14mm to 50mm

Features a precision machined case with an integrated heat sink to lower operating temperatures

Replaces stock plastic brace to stiffen front end

so changing batteries for more fun driving is quick and easy - aided by the T-plug battery connector on the waterproof

Team FastEddy - Tamiya 620 Rubber Sealed Replacement Bearing 2x6x2.5mm (10) MVK150000 The stock Axial Yeti transmissionFastEddy Bearings are a high quality steel chrome bearing with 2 Rubber Seals. Time has proven this bearing for exceptional performance and durability in the Hobby Industry including RC Cars, Boats, Robotics, Bicycles, & many other uses. (10) 620 Rubber Sealed Replacement Bearing 2X6X2. 5