We have already repeatedly emphasised how all the technical aspects of a kart significantly contribute to achieving a top performance. A basic vehicle like a kart is extremely responsive to any adjustment and each accessory can affect the performance in a considerable way. For this reason, the Freeline accessory range, which we refer to in the various in-depth analyses on this web site, is manufactured following a production process marked by extremely high quality standards. From the design up to the production of every single accessory, Freeline engineers have to optimise every parameter in pursuit of the top performance, both as far as construction and final results on the track are concerned. Thanks to the superior quality features of its rims, Freeline managed to achieve leading market positions. In particular, the Freeline magnesium rims are among the most widely used all over the world. Rims are noticeably important accessories since they have the essential task of enabling tyres and chassis to work under top conditions, which is a crucial aspect from the technical point of view. The range of Freeline rims is divided into two series, depending on the material they are made of:

- Magnesium
- Aluminium

Let’s go through the differences and features of the two different solutions. Because of the properties of the alloy they are made of, magnesium rims are lighter and favour the discharge of the heat generated by the friction between tyres and track. This property enables the tyres to preserve a constant inside pressure, thus ensuring also optimum long-distance performances. On the other hand, the rims made of magnesium, which is a valuable and more fragile material, are more expensive and shock-sensitive than aluminium rims. In consequence of the above said qualities, magnesium rims offer best performance on very “grippy” tracks and with high temperatures. Aluminium rims, on the contrary, ensure higher structural resistance, but lower heat discharge during use. This property can contribute to a pressure increase in tyres. Therefore, aluminium rims should be mainly used in cold or rainy weather conditions.
Rims are available in the following sizes:

- dry track: front 130 mm ; rear 210 mm;

- wet track: front 120 mm ; rear 180 mm;

The rims used can determine a different set-up; a possible adjustment is that of using 120-mm rims on the front also in dry track conditions. This choice offers better trajectories into bends.