There are two Losi 4-wheelers, the XX-4, and the XXX-4; each has an advantage and a disadvantage. The X - 5 converts a XX-4 to single-belt drive, combining the advantages of both cars and getting rid of the disadvantages of both cars.
The XX-4 is still today probably the best handling, best jumping 1/10 electric car ever built. It's great in bumps, grass, whatever. It corners better than any other car. But the 3-belt drive system gives it too much rotating mass in the driveline. This means it accelerates slowly.
The XXX-4, with a single-belt driveline, accelerates like a rocket. But the re-designed XXX-S doesn't have enough ground clearance, resulting in poor performance over bumps, on grass, and difficulty landing jumps.
Paul has run his XX- and XXX-4 in different heats at the same race, with transponders. The results were identical lap times and race times. The XXX-4 is much faster on the main straight, and the XX-4 is much faster through the rest of the track.
By maintaining the exact dimentions of the XX-4, using the XX-4 steering and complete suspension, and maintaining the identical weight distribution, the X - 5 handles just like a XX-4. That is, it handles and jumps great, and it's very easy to drive fast.
By using the single-belt drive system, like the XXX-4, the X - 5 accelerates like a rocket. It's straight line speed and acceleration are the same.
Finally, the XX-4 has long been a durable car, as 4-wheelers go. Losi long ago worked out the bugs and the car never breaks unless you really hit something hard. The XXX-4, on the other hand, has less of a reputation. The X - 5, using all XX-4 parts, is just as reliable as a XX-4.
So you get a XX-4 with the speed of the XXX-4! It's very fast, durable, and puts the fun back in 4WD. For additional information, check out www.4wdrc.com
, the web site for all electric 4WD.