Racing is all about speed. There are two speeds associated with RC vehicles. Actual speed how fast RC vehicle can run and scale speed is a relative speed as compared to the original version. With RC vehicles you can get speed of around 15 to 60+ mph. some modifications can this speed to close to 100 mph. Speed of all RC vehicles depends on the air fuel mixtures used when it comes to gas RC trucks.
HPI Savage 25 Nitro is one of the fastest trucks. It can reach a speed of 40 + mph and a more powerful version of HPI Savage 21 and 2.5 horsepower. The Traxxas TMaxx is also nitro gas powered truck and reaches a speed of 40+ mph. it is a competitor of HPI Savage 21 both are priced at $459.
Traxxas Nitro Jato is considered fastest of its category. It is known for its ready to run kit. Once it is out of box it can be taken to the track just filling of fuel tank is required. It falls in the stadium Trucks category with a 2WD capability it can reach a speed of 55+ mph. It is a awards wining model, best in durability, best in speed and best in acceleration.
Scaled RC Trucks
Radio controlled vehicles are built as scaled down versions of original vehicles. For example scale 1:10 or 1/10th means 10 times smaller in size as compared to original vehicle. These scaled versions try to replicate the full size version in many aspects. From outlook to the driving capabilities like power, speed, turns etc.
Scale models can be of almost any size from size of your palm to very gigantic size. In some cases scaled version even may be bigger than original version. In designing scaled version of some RC vehicle it is tried that scaled version should replicate the most of the aspects as closely as possible. Many scales have been deployed such as 1:5, 1:6, 1:10 and so on. Mini-RC vehicles come in different sizes including 1:28 and 1:64. Same scale would not be of the same size because it depends on the original counterpart.
For beginners 1/10th scale is highly recommended. Both electrical and gas models are available. For on road application Tamiya F-150 is the best choice. Suspension is lowered one and it can handle fast speedy turns. For medium speed off road application at 1/10th scale RC stadium trucks like Traxxas Rustler and DuraTrax Evader ST are highly recommended. Popular body styles are available like Ford, Mazda, Toyota and Nissan. These trucks are ready to run models and can take a speed of 25+ mph.
Mini RCs are the latest craze and these are available in 1:18, 1:28, 1:64 scaled versions. At this scale electric one are the best choices. Popular models are Tamiya TLT-1 Rockbuster and Kyosho Mini-Z Monster Truck.