The T-Maxx is a large 1/10 scale nitro monster truck made by Traxxas. It is currently available with either a TRX 2.5 or the more powerful TRX 3.3. It originally came with the Traxxas Pro .15 engine. The T-Maxx is one of the best selling RC monster trucks in production, and many aftermarket upgrades are available for it. Most monster trucks made after the T-Maxx use the same size wheels and tires, which means they can be interchanged. Other variations of the T-Maxx are the Sport-Maxx, Stadium-Maxx, and the electric E-Maxx.