Typical kit contents. (nippers not included)
Mini4WD was first introduced in 1982 by Tamiya as a toy kit. Over the next 4 decades, the kits would see many changes and upgrades that would benefit the competitive hobby, however the core aspects of mini4WD still remain the same.
The kits are fairly inexpensive, $10-$20, and can be assembled in less than an hour with only two common tools. The completed machine has a final footprint close to 4”x6”, or the size of a standard postcard and at the four corners of the machine are small rollers that give the kits their distinctive look. The machine is powered by a pair of AA batteries and a small electric motor that is connected via gears so that all four wheels turn when powered on. However, what is more notable is the complete lack of any mechanism to steer or control the speed of the machine once it is turned on.
The track, is therefore an integral part of the hobby. Visually, Mini4WD tracks are 3 or 5 lane tracks with each lane separated by a wall, though it is important to note that all lanes are connected via a crossover section. Therefore, the track is one long “chute” that is coiled on itself 3 or 5 times. A machine placed in a lane will travel down the track until it contacts the wall, at which point the rollers on the corners will roll along the wall and direct the machine forward or around a turn. A 3-lane race will run for 3 laps and a 5-lane for 5 laps so that each car takes a turn traveling down each lane of the connected track.
The forced reliance on the interaction between the car and the track is what sets Mini4WD apart from other hobbies. As there is no interaction between the racer and their machine once it hits the track, there is no competition of skill as it relates to personal performance. Rather, the hobby is a test of a racers ability to learn, solve problems, and implement mechanical mitigations. It requires racers to understand how their machine will behave as it proceeds on its own through various combinations of turns, straights, inclines, pitches, and even jumps (Yes, jumps!). Then, through a process of tuning, part swapping, or outright modification, racers must optimize their machine for the presented track conditions. This leads to another distinction between Mini4WD and other seemly similar hobbies. Racers must first conquer the track before they can compete against other racers. The track is always the biggest competitor and the greatest equalizer because each race will feature a new track layout. All racers and all cars, no matter what level of experience or history on the track will face a new challenge each race.
Sample track layout
The competitive aspect of the hobby first began in 1988 at the first Japan Cup, the official Tamiya sponsored competition in Japan that still runs today. Every year, tens-of-thousands of participants from around the world come together to compete on a giant 5-lane track specially built for the event.
Outside of Japan, the popularity of mini4WD is on the rise. In these areas, competitions are primarily held locally wherever there is an available track and enthusiastic hobbyists. Typically, these smaller competitions are broken up in to race classes such as Box Stock, Tuned, or Open. Various race classes are designed to add to the challenge through special restrictions regarding upgrade parts, chassis types, or particular mechanical methods. However, it is incorrect to think that one class is easier than another to master. Rather, different classes offer racers the opportunity to explore different aspects of a machine’s performance and learn how to maximize the tuning options available to that class.
If this sounds interesting to you and you are wondering where to start, then read on to learn more about selecting a kit. Or, if you prefer, come out to our next Mini4WD event and see for yourself the challenge and fun of mastering the track with these small but deceptively simple machines!