The speed king: Limitless
The Limitless is ARRMA's dedicated speed car - a low, aerodynamic 1/7 machine built to chase top-speed records rather than jump. On tall gearing and 8S it is the one that reaches into the high-double-digit and, with tuning, triple-digit mph territory on a long, smooth surface. If pure top speed is the goal, this is the platform.
The fast street machine: Infraction
The Infraction is a low-slung 1/8 street basher - not a record car, but genuinely quick on pavement and tough enough to survive a mistake. A better real-world choice than the Limitless if you also want to bash occasionally.
The fast monsters: Kraton 8S, Mojave, Outcast
Among the trucks, the 8S rigs are the speed leaders. The Kraton 8S and Outcast 8S pair big power with big tyres; the Mojave desert truck is built for high-speed runs over rough open ground where a low speed car could not go. These are fast and can take a landing.
A realistic speed picture
| Platform | Built for | Speed character |
|---|---|---|
| Limitless | Top-speed records | Fastest ARRMA (needs long smooth runs) |
| Infraction | Street speed | Very fast on pavement, tougher |
| Kraton 8S | Big-air bashing | Brutal speed with jump ability |
| Mojave | Desert high-speed | Fast over rough open ground |
| Typhon 6S | Speed buggy | Very fast for its size and price |
Every one of those numbers moves with gearing, battery voltage and surface. A stock truck on 6S is already faster than most people expect; a geared-up 8S on a smooth road is another thing entirely - and needs real space to use safely.
What actually makes an ARRMA faster
Voltage - going from 6S to 8S is the biggest single jump.
Gearing - a taller pinion raises top speed (at the cost of acceleration and heat - do it carefully).
Tyres - a bigger diameter effectively raises the gearing.
Surface - smooth pavement lets a car reach its potential; grass and dirt never will.
See the ARRMA Limitless speed car on Amazon →
Chasing speed as a first truck is a trap - read best ARRMA for beginners before you buy the fastest thing you can find.