Racetech 4100 Series

The RT4100HR is a fibreglass race seat equipped with head restraint wings for enhanced safety. We focused on achieving a lightweight seat shell with optimised geometry, straddling that line between designing the seat to be wide enough in the shoulders to suit the athletic build, but narrow enough to fit in most cockpits. Our patented back-mounted technology has trickled down from the 119 and 129 Series, giving you the option to fix the seat to the rollcage at shoulder level. Large harness guides and a removable moulded base cushion allow a range of drivers of varying heights to fit. Parallel sides and pronounced thigh support round off the features of this accomplished motorsport seat. For the larger driver, the RT4100WTHR is 60mm taller and 40mm wider. For those wanting a seat without head restraints, our RT4100 and RT4100WT complete the 4100 Series.

RT4100 Standard size, FIA approved
RT4100WT Wide-tall size, FIA approved
RT4100HR Standard size, Head restraint, FIA approved
RT4100WTHR Wide-tall size, Head restraint, FIA approved



  • FIA 8855-1999 Homologation
  • Shell weight from just 5.7kg!
  • Back mount compatible
  • Removable base cushion
FIA 8855-1999 Homologation

The seat is FIA 8855-1999 approved and has a 5 year lifetime. The silver hologram is an anti-counterfeit method and is applied in the Racetech manufacturing plant on completion of the seat.

Back Mounted Design

Back-mounting your seat to the rollcage at the shoulder level provides improved safety during sideways and oblique impacts, reduces driver fatigue and enhances driver feel of the car.

Moulded Base Cushion

Keep your legs comfortably spaced and with this contoured foam cushion. Velcro fastening means that you can easily remove the cushion if you prefer to lower your centre-of-gravity and sit directly on the seat shell for a more commanding feel of the chassis beneath you.

Model Material FIA A B C D E F G H I J K L M Shell Weight Total Weight
RT4100 Fibreglass  8855 60 56 38 47 50 87 63 n/a n/a n/a 56 67 40 5.7 7.6
RT4100WT Fibreglass  8855 64 62 42 51 50 93 69 n/a n/a n/a 62 69 44 6.0 7.9
RT4100HR Fibreglass  8855 60 56 38 47 50 87 63 45 32 77 56 67 40 6.1 8.1
RT4100WTHR Fibreglass  8855 64 62 42 51 50 93 69 45 32 83 62 69 44 6.6 8.6
      dimensions in cm weights in kg

dimensions key