Extending the wheelbase on RC cars is nothing new but I've yet to see anyone document this for the WL Toys 144001 Thus, I've written this article to show you how to do it step by step. There are a number of benefits, not least of which is straight line stability. The good news is that this requires no extra parts and it only takes about 10 minutes

Basic theory for extending wheelbase
Changing wheelbases has long been something you could do with race-spec RC cars in order to adjust for track conditions. Generally speaking short wheelbases allow for faster turning (sharp corners in particular) and longer wheel bases allow for better straight line stability. The 144001 is overpowered for such a small car (especially if you upgrade to brushless) that any increase in wheelbase is welcomed ESPECIALLY if you are looking at speed runs where straight line stability is crucial.

Extending the wheelbase on a WL Toys 144001
The good news is this is very simple on the 144001 and it's free - no new parts are needed and so far as I can tell there are no compromises to the car. In fact there are slightly more benefits than I first thought:

1. More straight line stability as already mentioned
2. Weight balanced shifted forward slightly which is a good thing given the rear bias with the big motor
3. Reduced chance of wheelies during speed run

Anyway on to the guide:

I've now completed a number of articles that have improved the handling, power and efficiency of the WL Toys 144001 and 124018 and 124019 which can be found here: All my WL Toys 144001 /124018 / 124019 upgrade articles. ​The next item I am addressing is the tyres. The stock wheels and tyres (like the rest of the car) are modelled closely on the LR Racing EMB-1h micro pins which are designed for carpet and hard packed dirt racing. Outside of these grip isn't great, and when you take into account the the rubber is firmer on the 144001 tyres then you are left with a tyre that is not really suited well for bashing off-road. In this article I'll explore some better bashing alternatives that shouldn't compromise the rest of the car

Stock tyres have an outside diameter of 72mm which is the same front and rear (it needs to be on a 4wd). Widths are staggered meaning they are slightly wider at the rear - 30mm compared to the front - 26mm. Again typical for a buggy because on acceleration weight transfers to the rear and the extra width provides more grip. Drive on the wheels is provided by a 12mm hex drive which is something of an industry standard on cars around this size

The problem is that a combination of the design and compound of the tyre mean that they don't grip well on the majority of surfaces we run (off road bashing and tarmac). Since the 12mm hex drive is common there are a lot of wheels that physically fit but not a lot that work well because of the uncommon diameter. On to the theory: