To make the racing more competitive, and also to try and make it as fair as possible, the WSSCC is split up into different classes depending on engine size, tyre choice and car type.

The different classes are explained below.

Treaded tyres
These can be chosen from a List called A1 Treaded tyres.
(See Motorsport UK website for a list of tyres)
AT - Saloons, Road Sports & GT cars up to 1600cc.
BT - Saloons, Road Sports & GT cars 1601cc to 2000 + Kit cars up to 1600cc.
CT - Saloons, Road Sports & GT cars over 2001cc + Kit cars 1601cc to 2000cc.

Slick tyres or treaded/wet tyres
AS - Saloons, Road Sports & GT cars up to 1600cc.
BS - Saloons, Road Sports & GT cars 1601cc to 2000 + Kit cars up to 1600cc.
CS - Saloons, Road Sports & GT cars over 2001cc + Kit cars 1601cc to 2000cc.
D - Super Cars
M - Motorcycle Engines
I - Invitation Class for all Guest Competitors.
Guest competitors will not have to register for the Championship, but must agree to abide by the "Code of Practice". They will not be eligible for championship points or class awards but may be eligible for "Driver of the Race" award.

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