quality seamless steel tubing of minimum 35mm diameter and wall thickness of 2mm. It should have the top bar straight or slightly curved but no tubes meeting in an inverted‘ V’. It must be effectively braced to structural members.
25.2. Non-standard Vehicles are advised to fit a rollbar to the following minimum requirements.
a. Minimum height 72cm from the rear of the uncompressed seat cushion. b.
c.
d.
It must have minimum flat width of 38cm running into radiused corners and affording driver and if applicable Passenger equal protection.
It must be effectively mounted and braced to structural members forward and aft of the cockpit and not less than cockpit width.
It must be constructed of good quality seamless steel tubing of minimum 32mm diameter and wall thickness of 1.5mm.
26. ALL aluminium alloy Roll Cages are prohibited. Motorsport UK National Competition Rules 2026 Edition 2
Chapter 7 Appendix 3- Roll Over Protection Systems( ROPS) 270