The first step on the Radical ladder; the SR1 XXR is the perfect track weapon for rookie and novice drivers embarking on their motorsport journey.

Although entry level, the SR1 offers an outstanding package with unparalleled performance for money, that will get you on the grid in a professionally administered race series.

The SR1 XXR has been substantially revised with a new design, increased aerodynamics and improved durability with RPE's new Generation 5 1340cc racing spec engine.

Drivers of all ages and backgrounds have taken advantage of the detailed on-track tuition and support offered by Radical with the SR1 since the launch in 2012.

Such has been the rapid growth of this first step on to the Radical racing ladder, the SR1 was substantially revised in 2017 with dramatic new styling, improved aerodynamics and updated electronics, and again in 2023 with the XXR generation reinforcing that you can’t go faster and have more fun for less.

Awarded 5 stars by EVO magazine in 2024, described as the most fun car you'll ever drive - so immediate, so controllable and so thrilling.

XXR で一日を過ごし、XX のオーナーでもある私は、新型 XXRがすでに優れた SR3 をさらに進化させた、非常に歓迎すべきモデルであると自信を持って言えます。

— トビー・ソウリー（Radical オーナー／インディカー・プロドライバー）

このクルマのバランスこそが、記憶に深く残る。途方もないスピードでも修正が容易で、ドライバーに自信を与えてくれる。
私はロードカーが大好きで、人生のほとんどをそれに乗って過ごしている。でも、それはできないんだ。

- アンドリュー・フランケル（オートカー誌「年間ベストライターズカー」）

SR1 XXR Standard Equipment

Body

Lightweight spaceframe chasis
Composite gelcoat bodywork
LED running lights and brake lights
Le Mans-Spec pre-preg carbon composite mirrors

ENGINE

RPE liquid cooled, 4-cylinder, 16-valve 1340cc engine capacity
Coil-on-plug ignition system
Bespoke dry sump, mechanical oil pump
Electronic drive-by-wire throttle
Carbon airbox with overhead fuel injection
Hi-flow racing exhaust system
Life Racing ECU and data logging

COCKPIT

Two-seater or single-seat chassis
Quick release steering wheel
Display unit with LED rev counter and shift light
Dash-mounted brake bias adjuster

SUSPENSION AND BRAKES

Radial four-pot calipers front & rear
240 × 25mm 30-vane ventilated discs
Fully adjustable Nik-link suspension
Front and rear wishbones, adjustable pushrods
Fabricated uprights
Interchangeable roll bars front and rear
Intrax single adjustable damper

POWERTRAIN

Mid-engine, rear-wheel-drive
Six-speed, integral sequential gearbox
Quaife gear final drive, limited-slip diff.
Pneumatic paddleshift with auto-blipper

WHEELS AND TYRES

Braid cast aluminium wheels
7" × 13" front tyres
9" x 13" rear tyres
Hankook Racing Tyres (slick & wet options)

DIMENSIONS

Length：3860 mm
Width：1560 mm
Height：1020 mm
Weight：510 kg

SR1 XXR OPTIONS

SmartyCam GPS video system, data logging
Quiet track day silencer
Radiator fan and trickle charger
Engine oil pre-heater and fuel sampling kit
Choice of 7 bodywork colors
Choice of 5 harness colours
Graphics packages available from factory

Core to the Radical DNA is the aerodynamic grip, nimbleness and balance. Known all around the world, by drivers of all abilities as a terrific car to drive – easy to pick up but hard to master.

Unlike road cars that have been modified for track use, the full Radical range has been designed for track use from factory. The chassis is optimised for performance, focusing on aerodynamics, high downforce, and stability at high speeds. This ensures that the car provides maximum grip and agility during high-performance driving.
Beneath the skin of every Radical is a tubular spaceframe chassis that provides an excellent strength-to-weight ratio, enhancing the car's overall performance and safety. The design of the chassis helps reduce the overall mass of the vehicle, resulting in improved acceleration, braking, and cornering performance. Surrounding the chassis, the lightweight composite fibreglass bodywork is available in a choice of seven colours from factory. Combined with the spaceframe chassis, this provides unbeatable value for money for a pure track car that is easy to maintain and repair anywhere in the world.
Adjustable rear push rods and three-way dampers allow drivers a full range of control to setup the car ready for the track ahead. An adjustable rear wing allows the driver to change the setup to suit the conditions, exploring the balance between straight-line speed and cornering performance.
With over 25 years of experience and more than 3,000 cars sold to date, every component on a Radical has been tested under extreme conditions to give customers the confidence they need to push lap after lap. New innovations, such as the optional cockpit safety structure, are designed to further protect the driver. Crash boxes and fuel cells along with fire extinguisher systems come as standard.
Choose from single or dual seat options to allow for driver coaching or entertaining passengers. Each car is also available with various seating position options including centre-seat, left or right-hand drive. The dashboard features a customisable digital display to bring real-time information to the driver, and comes equipped with an onboard video system with GPS and race logging, including brake pressure and steering sensors.

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-built 1340cc Generation 5 engines are the most durable combined engine and gearbox packages on the market.

RADICAL EXPEREINCE

Get a taste of the Radical experience through our high-octane, action-filled events. From exhilarating ride-alongs to tailored sessions for various skill levels, our programs are meticulously designed to foster driver development. Under the guidance of professional coaches and within a controlled environment, participants can hone their abilities, build confidence, and unlock their full Radical potential. These events offer an authentic preview of the intense competition and unparalleled thrill found in the Radical Japan Cup.