Today we're discussing go-kart rear axles. When it comes to motor racing, cars have suspension. So karting is different because the rear axle acts like a suspension. It might flex a little bit here and there depending on the stiffness of the axle, but realistically it doesn't spring like suspension does. 

So, it's important to use it as a tuning tool depending on the conditions that you are driving in. You might find if it's 15 degrees or it's 35 degrees, you might have to use a different axle, or depending on the tire compound or the changing grip levels across a race weekend.

Drivers & mechanics can also change the length of the axle. The different stiffnesses change how much the kart flexes in the rear. There are different size axles for cadet karts compared to a senior kart. It's important to know that most kart manufacturers send karts out with a neutral medium axle. Now, the reason why karts are designed around that neutral setup, is it gives you a bigger window to fine tune your setup of the kart. You're very limited with the changes you can make when you're at one end of the spectrum. That’s why kart manufacturers design karts around a neutral setup, and at least that way you can fine tune the chassis it if it's not quite right. You’re able to try a softer axle or to a different length axle.

If you need to learn more information about how to setup your go kart, we have a dedicated Kart Setup Guide, to help you make informed decisions across a race weekend. Check it out here: Go Kart Setup Program (kartclass.com)

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