Traxxas 5174 Silver Chrome 3.8" Wheels with Talon tires and Foam Insert (2) T Maxx E Maxx E Revo 1 24 Vehicle Here's how momentum works in Here's how momentum works in Tech 7: When a real locomotive is given a throttle increase there is a lag time until the preselected speed is reached Rebuild able design (partially rebuild able) and screw less motor case for easy routine maintenance effectively prolong the motor life and raise the motor effficiency Available as assembled and pre glued with installed foam inserts on Gemini and Split Spoke rims in a variety of finishes 8" Wheels with Talon tires and Foam Insert (2) T Maxx E Maxx E Revo