The fundamental characteristic of the TBKART S55 model is that of being made up of tubes all with a diameter of 30 mm, unlike the other model of the Italian manufacturer, the S197, which is instead "entirely 32". The S55 is available both in a single-speed version (the one this article covers) and in a gear version. The latter stands out for the obvious accessory kit specific to this type of kart (braking system also on the front axle, gear lever and clutch), but also for the different axle bearing supports.
With the S55, TBKART wanted to create a chassis that in a single-speed version goes well with the grip conditions that most practicing kart drivers from all over the world encounter, therefore tracks that are not extremely rubberised and the use of tyres with a basically hard compound. In order to further meet the needs of the drivers of the various classes, TBKART then differentiated its production, developing a particular body design with geometries dedicated to the Junior classes, which need - given the lower power involved - greater smoothness. On the contrary, for the Senior classes, always working on small production details of the body, it instead favoured grip when braking and smoothness when exiting bends. The reduction of unnecessary welds has allowed a general lightening of the chassis and a stiffening of the body: having fewer welds for the attachment of accessory elements means stressing less side stringers and crossbars, or the main tubes of the body.