UKRRA 1/24 Retro Car Standards

Each of these documents is a complete and self-sufficient set of rules. All the rules are in pdf documents, for reading on-screen or downloading.

UKRRA Car Standards 2018

UKRRA F1 dimensions

UKRRA Saloon dimensions

UKRRA CanAm & Tottenham dimensions

UKRRA Sporting Regulations 2018

1/24 “Retro” Classes and Standards


John Secchi's 'Tottenham Retro Rules', which are based on the ARC (Association of Raceway Centres) rules from the late 1960's, have been used in running races for the type of cars that would have raced on Britain’s commercial raceways in their heyday.

Anyone interested in reading, or using these original rules can find them here:

Original Tottenham 1/24 Retro Rules

Can-Am cars on the grid at one of North London’s regular retro evening events.

Photo courtesy of Steve Kempson.

With the increased popularity of 1/24 Retro racing (with vacuum-formed bodies), and the success of the big festivals for these cars over the past couple of years, the organisers of these events have got together to agree a unified set of car standards which took effect from the beginning of 2012, and which have been gradually refined over the following years.

These rules were originally discussed and agreed between the racers based at Raceway 81 (Newcastle) and Rockingham Raceway with additional input from the clubs at North London and Oaklands Park.

To differentiate these rules from the North American (e.g. IRRA) rule sets, they are called the UKRRA (UK Retro Racing Association) rules.

It is not the intention to try and force any club to adopt these new rules. These are however the rules that have been used at the major inter-club events from 2012 onwards.

It is hoped that, in time, all clubs running Retro 1/24 events will adopt the same rules, making more inter-club racing possible and encouraging the growth of this aspect of our hobby. A set of sporting regulations has also been produced for Championship events which can be downloaded below.

CSCRA 1/24 Hard-body Car Classes

These classes were inspired by the interest in racing cars based on the 1/24 Merit kits from the ’50’s. Since that time there have been a number of kit and slot car manufacturers that have produced suitable cars and these standards have been worded to encompass all of these and any modern resin reproductions and scratch built models.

CSCRA 1-24 Hard-body GP car standards

CSCRA 1-24 Hard-body Sports car standards

The intention of the UKRRA 1/24 Retro classes is to encourage a return to “scratch-built” chassis and a more scale appearance in vacuum-formed car bodies, similar to the car and chassis designs of the late 1960’s and early 1970’s.

Hard-body 1/24 cars on the line during the 2008 North London retro event.

Photo courtesy of Steve Kempson.