The first step on the Radical ladder.

02m 11s
Silverstone laptime
Silverstone GP
02m 11s
James Pinkerton
Donington GP
01m 34s
Daryl De Leon
Clark International Speedway
01m 57s
Inigo Anton
Ring Knutstorp
01m 01s
Filip Svensson
Silverstone GP
02m 11s
James Pinkerton
Donington GP
01m 34s
Daryl De Leon
Clark International Speedway
01m 57s
Inigo Anton
Ring Knutstorp
01m 01s
Filip Svensson

It’s a proper race car experience and feels nothing like any of the road-legal machinery I have driven before. It’s easy to see how drivers get hooked.

Alistair Charlton, Forbes

Racing the Radical SR1 is very exciting. The aerodynamic downforce allows you to brake much later and take corners much faster than you would think possible

Daryl Deleon, Radical SR1 owner and Radical World Champion.

SR1 XXR Standard Equipment


  • Lightweight spaceframe chassis with FIA-specification safety cell and crash structure
  • LMP-inspired, high-downforce composite bodywork
  • LED race lighting including FIA high-intensity central rain light
  • Le Mans pre-preg carbon composite mirrors


  • Gen 5 RPE liquid cooled, in-line four, DOHC, 16 Valve, 1340cc
  • Gen 5 RPE dry sump and cooling system
  • Gen 5 RPE coil-on-plug ignition system
  • Electronic Drive-By-Wire
  • Life Racing engine management system and data logging
  • Hi-flow racing exhaust system


  • Two-seater chassis with twin or single-seat options, optimised for use with a moulded race seat insert
  • AIM MXS display unit with LED rev counter, gear indicator, shift light and data logging capability
  • Dash-mounted brake bias adjuster
  • Quick release steering wheel
  • Wind deflector


  • Radical four-pot calipers. 240mm dia. × 25mm, 30-vane ventilated discs front and rear
  • Aluminium, foam filled 54L fuel tank
  • Full fire extinguisher system

Power train

  • Six-speed, integral sequential gearbox
  • Radical developed paddle-activated gearshift system with auto-blipper
  • Quaife gear final drive and limited-slip differential, reversing gear system
  • Mid-engined, rear-wheel-drive


  • Fully adjustable Nik-link suspension system, front and rear unequal length top and bottom wishbones, fabricated uprights, front and rear adjustable pushrods
  • Interchangeable roll bars
  • Intrax dampers

Wheels and Tyres

  • Radical cast aluminium wheels
  • 7" × 13" diameter front and 9" × 13" rears
  • Semi-slick & wet tyre options, Radical recommends Hankook


  • Length: 3860mm
  • Width: 1560mm
  • Height: 1020mm
  • Weight: 510kg
View all equipment

SR1 XXR Options

  • Convenience Pack (Engine oil preheater and fuel sampling/drain kit)
  • Quiet track day silencer
  • Loud exhaust LED race lights
  • Dash mounted brake bias adjuster
  • Enhanced Data Pack (SmartyCam video system with GPS and race logging, including brake pressure and steering sensors)
  • FiA certificated fuel cell
  • Nik-Link rollbar set
  • Forward-facing stay head protectors
  • Composite halo head restraint
  • Passenger seat belts and headrest
  • Driver & passenger seat inserts

Under the bonnet

RPE Gen5 1340cc

RPE have advocated lightweight, high-output powertrains in racing applications for two decades. Radical’s unique engine facility means that the latest hand-build 1340cc Generation 5 engines are the most durable combined engine and gearbox packages on the market.

Learn more
RPE-Suzuki 1.5 litre

Where to race your SR1 XXR?

Find your nearest Radical series by browsing our global list of Radical Cups. Go wheel-to-wheel with like-minded racers and hone your racing skills. All our series have technical support, trackside hospitality and media coverage to help you get the most from your Radical racing experience, both on and off the track.

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Find a Dealer

Radical has over 30 dealers across the globe. Locate your nearest dealer and contact them for further information.

Find a used SR1 XXR}

Find a Used Radical

Looking to purchase a second-hand Radical? Browse our global inventory of used cars and find your perfect pre-loved car today.