CHAPTER 12 RACE Appendix 14- Single Seater Dimensions
1. Drawing number 1 1.1. Safety roll- over bar
1.2. Substantial Support structure
1.3. Crushable structure 1.4. Substantial structure 1.5. Front track 1.6. Rear track
1.7. Wheelbase( unless other stated in Official Documents)
Notes: Maximum height is measured with the Driver aboard. Maximum height excludes safety roll-over bar on which there is no maximum height. FIA substantial support structure( 2) and( 4) apply only to certain International Formulae
Single Seater Dimensions All dimensions in cm Refer to Drawing
( A) Maximum rear overhang from rear wheel axis unless specified otherwise( B) Maximum front overhang from front wheel axis N / A *( C) Maximum height measured from the ground 90( D) Exhaust height measured from the ground( E) Maximum body height in front of front wheels( F) Minimum safety roll-over bar length in line with Driver’ s spine 92( G) Minimum allowed helmet clearance 5( H) Maximum width N / A( I) Maximum rear aerofoil width 95( J) Maximum body width behind front wheels N / A( K) Maximum nose width N / A( L) Minimum cockpit opening 45( M) Minimum cockpit parallel opening length 30( N) Minimum cockpit overall opening length 60( O) Maximum rear wheel width N / A( P) Maximum front wheel width N / A( R) Maximum width including crushable N / A( S) Maximum exhaust length from rear wheel axis –( T) Minimum ground clearance 4( 7) Minimum wheelbase( unless stated otherwise in Official Documents) 183
100
(* Except for within 450mm rearward of the front face of the ROPS and for a maximum of 150mm either side of the centre line where bodywork may not be more than 25mm higher than the upper surface of the ROPS.)
Motorsport UK 2025 National Competition Rules Version 11
Chapter 12 Appendix 14- Single Seater Dimensions. 431