The UK RC Crawler Association publishes rulesets for two scales (sizes). There is one ruleset for 1/10th scale trucks and one ruleset for Minis (1/24th and 1/18th scale).

At each scale the rules are then broken down into two further rulesets. The full competition ruleset, used for professional competitions and a cut down light version for use at events that want to include all trucks and drivers and encourage beginner participation.

All rulesets are open source and can be used by anyone to run an event or competition series.

Vehicles built to these rules will pass technical checking for WRCCA, IRSCC, RCMCCA and SORRCA based competitions around the world with slight modifications.

In the nature of the association, we are happy to accept recommendations on changes for the 2026 ruleset.