The British Truck Racing Championship can today (March 12) confirm a number of changes to the technical regulations for the forthcoming 2025 season.
Air Restrictor
The 2025 season will see the introduction of three different air restrictors in three different sizes – 63mm, 65mm and 67mm.
These restrictors will be fitted to the turbocharger inlet on the top-three trucks in Division 1, based on the success of the individual participants.
At Brands Hatch season-opener, the top-three finishes from the 2024 season (Ryan Smith, David Jenkins and Steven Powell) will be required to have the aforementioned restrictors fitted to their machine.
First place will be issued the 63mm restrictor, second place the 65mm restrictor and third place the 67mm restrictor.
Following the opening round of the season, those leaving Brands Hatch in the top three positions will then be required to fit the relevant air restrictor for the next round at Pembrey. This process will continue throughout the season.
Steering Axle
The castor angle of the steering axle on all Division 1 trucks will be limited to a maximum of 30 degrees, with positive camber being allowed up to a maximum of three degrees.