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The SIGMA RS3 has been developped especially for medium tyres in Rotax, X30 and OK, where the longer wheelbase and welded column support will ensure more effectiveness.

Equipped with a new frame – tubes Ø30 – and its new aluminium floor tray, the Sigma RS3 2024 is a exceptional and easy chassis for winning under all track conditions.

New evolutions :

  • Modification of tubes quality on OK/OKJ frame.
  • Hard stub axles are replaced by a softer model
  • Steering tie rods change from 266 to 276mm.
  • Cetrnal bearing cage (PC0274.054) with its support (PC0275.067) are suppressed.
  • Karts are now mounted with two bearing cages only.
  • Ø80mm rear wheel hubs are now mounted as original equipment.
  • Front flat stabiliser is modified as original equipment.

Features – Racing features



Wheelbase1050 mm
Framedouble tube removable – CIK
Tubeø 30mm
Rear AxleHollow steel ø 50mm – 3 bearings
Axle bearing supportAnodized, bearing ø 80mm
Stub axlesø 25mm “Hard”
Rear hubsAnodised, fully machined, L. 90mm
Brake4-pistons hydraulic brake system – CIK
Brake diskFloating and turbo ventilated disk
Front wheelsMagnesium low volume, 130mm
Rear wheelsMagnesium low volume, 212mm
TankRemovable 8 Liters
SeatTekneex Racing Polyester
Steering wheel

Aluminium alcantara covering Sodi

SafetyProtective base plate for break disk, brake pedal with 2 points attachment, integral chain cover, anti-locking bar
Frame colourBlack + varnish
BodyworkKG Sodi CIK approved
Rear bumperKG plastic