Chassis
The chassis is of tubular steel construction. The chassis have sheet metal panels added but these must not be structural. The chassis dimensions are tightly controlled.

Suspension
The suspension can have many differing types of geometry, including Outboard, inboard rocker & inboard push pull rods, however all configurations of suspension geometry are once again tightly controlled by stated dimensions which are often checked.

Bodywork
Bodywork must not contain any exotic materials, for example Carbon Fibre. Aerodynamic aids such as wings are strictly prohibited. In a majority of cases the bodywork is moulded from glass fibre and essentially creates an aerodynamic external profile and encloses the driver, a typical set of bodywork includes a nose cone, top section and 2 side pods.

Wheels & Tyres
Tyres are controlled, only two different tyres are allowed. Firstly the relatively modern AVON ACB10 grooved tyre. This tyre is primarily used by the more modern FF1600. The alternative, which is popular with the older cars, is the AVON ACB9. This treaded tyre looks more contemporary and has a slightly higher profile, however there is little or nothing to choose between them in performance.
Wheels have to be constructed from Steel, and be of controlled dimensions, otherwise they are free.

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