Synergy Rebel S20 2027 – Junior / Senior Rolling Chassis

New for 2027 – the Synergy Rebel S20. The latest Synergy big kart: a 30 mm chassis with a 50 mm axle, built by Birel ART in Italy to Synergy's specification and set up in the UK. Developed through a full season of testing and racing, with revised frame geometry, new materials and reworked components. One kart for everything from Junior through to Senior non-gearbox classes.

Standard or Factory?

Same chassis, same geometry – the difference is the material of the parts bolted to it.

• Standard – aluminium parts. The lower price, and everything most drivers need.
• Factory – magnesium parts fitted at Birel ART in place of the aluminium ones. Magnesium is lighter than aluminium, so it takes weight off the kart, but it costs more to make – which is why the Factory is the dearer of the two.

Choose your spec above.

Arriving 2027. S20 karts are built to order at the Birel ART factory – allow 6–8 weeks from order, with the first karts landing in January 2027. Order now to be on the first delivery.

New on the S20

• Revised frame geometry – sharper handling that adapts better to changing grip
• New "Full Cover" floor panel
• New steering wheel, shaped to take a data logger in the centre
• Optional one-piece stub axle with adjustable Ackermann

What you get as a rolling chassis

• Synergy Rebel S20 frame, 30 mm tubing, 50 mm rear axle
• Synergy bodywork and sticker kit fitted (nose, Nassau, side pods, rear bumper)
• Seat, steering wheel, pedals, brakes, hubs, wheels — everything except engine, mount and tyres
• Pre-delivery check and baseline set-up

In the builder: engines

• IAME X30 Junior or Senior
• Rotax Max Evo Junior or Senior

Buy an engine with the kart and we fit it, run it in, set the chassis to a sensible baseline for your class, size the seat and pedals to the driver and do a full handover at Whilton Mill — included. We match the frame version to your series and tyre when you order.

In the builder: upgrades

• Tillett T11 VG seat in place of the standard seat
• Alfano 7 data, Senzo trolley and tool box at 10% off with the kart

Build your Rebel S20 →

Price is for the rolling chassis. Delivery by pallet nationwide, or collect from our shop at Whilton Mill Kart Circuit.