2026 Radical Cup Korea Season Opener: Inside Korea’s Auto Racing World
Last summer’s global F1 movie release made car enthusiasts’ hearts race. Brad Pitt’s enduring charisma moved countless viewers, naturally sparking Korean audiences’ interest in auto racing despite motorsports being relatively unfamiliar territory.
Riding that momentum, Radical Cup Korea (RCK) launched in 2024 as Korea’s only Radical one-make race series, quickly establishing itself.
The 2026 season kicked off April 17–19 at Yongin Everland Speedway, continuing through Korea International Circuit (KIC) Yeongam and Inje Speedium in Korea.
Radical Cup Korea (RCK) Rounds 1 and 2 recorded the largest field ever: 8 SR10 class entries, 4 SR3, and 3 SR1–15 total drivers. Sunday temperatures spiked to 27°C (81°F), suddenly summer. But on-track heat exceeded the weather. Significantly more spectators than last year’s Super Race season opener proved it.
Radical Cup Korea
Radical Korea is a specialist company conducting circuit driving events and new vehicle launch training based on deep motorsports understanding. Radical race cars exist solely for track use. The combination of lightweight construction and aerodynamic downforce technology extracts driving’s pure pleasure to its limits.
Four classes run integrated sessions: SR1, SR1W (women-only class), SR3, and SR10. Notably, all rounds employ a “two-heat” format with two finals — unlike traditional Korean single-race formats, this structure simultaneously expands variables and strategic elements.
Radical Cup Korea rounds operate as support races within the Super Race Championship, spanning three days: Friday practice sessions, Saturday qualifying, Sunday finals. SR1, SR1W, SR3, and SR10 race cars run simultaneously, with awards by class after competition.
What I Saw from the Closest Seat to Track
Honestly, until visiting Yongin Everland Speedway, Radical Cup was an unfamiliar name.
Comparing Radical Cup to F1: F1 represents the top league where manufacturers invest hundreds of millions creating machines for elite professional drivers. Radical Cup is a track-only prototype race car series where amateur and semi-pro drivers compete under fair conditions in a one-make series. Same car, same tires — only driver skill makes the difference.
In late 2023, GRIT Motertainment (CEO: Lee Chang-woo) was selected as UK Radical Motorsport’s official Korean partner, launching Radical Cup Korea properly in 2024. CEO Lee possesses extensive racer experience and currently competes as an active driver in Lamborghini Super Trofeo Asia Cup with ‘SQDA-GRIT’ team alongside Lamborghini Seoul since 2023.
VIP Lounge: The Closest Seat to Track
SLDS Motorsports FJR team invited me to Radical Cup Korea’s VIP lounge. Drivers I’d only watched through race footage and Instagram — today, I met them face-to-face.
VIP perks included: grid walk encountering race cars up close on circuit, private VIP lounge access, premium catering, and taxi time
— actually riding in race cars with professional drivers.
Simply watching drivers, mechanics, and coaches operate nearby made racing’s precision teamwork tangible.
On track, you must leave all emotions in the pit and focus only on the road ahead. But suppressing instinct and ambition while driving isn’t as easy as it sounds. Riding motorcycles on track, awful survival reactions pop out unexpectedly. I know that letting go of ambition and listening more closely to the bike enables more precise, smoother riding — but my body reacts first. That’s the problem.
Radical Race Cars: How They Differ from Road Cars
Road-legal production cars must consider countless factors: stability, fuel economy, ride comfort, noise. Radical race cars were born solely for track from the start. Aerodynamics, braking, weight reduction — every racing-necessary condition optimized in a prototype.
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Among them, SR1 — the class where the driver/CEO, TaiYoung Kim, and SLDS Motorsport team compete — is most intriguing. SR1 XXR weighs 510kg (1,124 lbs) with 188 BHP maximum output, achieving 357 BHP/ton power-to-weight ratio. Compared to supercars like McLaren or Ferrari producing 700–1,200 horsepower at roughly 1.5 tons (3,306 lbs), SR1 achieves similar power density at less than half the weight.
More important than raw numbers: with relatively fewer electronic control systems, SR1 directly reflects drivers’ pure technical skill in lap times. SR1 felt like minimoto’s MSX125 Grom — a fundamentals-only class. SR3 equals quarter-liter bikes. SR10 matches liter-class motorcycles.
While motorcycles depend on tire maximum grip during cornering, car racing adds aerodynamic downforce creating additional grip. As speed increases, force pressing the chassis onto track grows, maintaining higher corner speeds — this is prototype race cars’ core appeal.
Data-Driven Racing
One unique Radical class culture: data sharing. In typical racing, data is team classified information. In Radical class, drivers share data and coach each other.
Under the goal that everyone gets faster, competitors simultaneously become colleagues — racing’s new sportsmanship.
AIM data loggers installed in SR1 precisely record not just lap times but acceleration/braking values, coolant temperature, G-forces. Drivers use this data to modify braking points, acceleration points, and racing lines with every session.
I only recently attached a RaceBox (recording device) to my race bike. Training to systematically reduce times based on data — just beginning.
Radical race car tires are Hankook Ventus semi-slicks — specifications unseen in regular production sports cars. Sitting in SR1’s driver seat felt nearly reclined.
Small mirrors on both sides barely show left and right. During motorcycle races, we remove anything breakable anticipating crashes, so “at least mirrors are attached” crossed my mind. But at Radical car speeds, even those small mirrors become irrelevant. Cars appearing as distant dots arrive alongside in a blink — every overtaking decision becomes a split-second sensory battle.
Discussing racing with SR10 driver Adam, I asked if he’d consider trying motorcycle racing. His answer surprised me — someone who hits 262 km/h (163 mph) on straights:
“Motorcycles don’t have side mirrors or anything to protect you. To be honest, it’s kind of scary.”
Racers experience fear too — perhaps what makes them more precise.
Driver TaiYoung Kim
TaiYoung’s automotive life began in 2004. After majoring in automotive mechanical engineering, he entered the industry as an online video content production PD — over 20 years accumulated. Subsequently working as journalist for Car Vision and Automobile Life, editor for Korean Motor Trend, and feature director for men’s magazine Esquire, his career choosing print publication essence amid digital transformation demonstrates genuine automotive passion. Beyond cars, his broad lifestyle interests — watches, science, gaming — make life itself his content.
Currently operating planning/production agency DAVE CONTEXT, he continues creative activities spanning domestic and international automotive brand advertising content planning, production, and media distribution.
What makes him more endearing: as a 20-year motorcycle rider, after one year’s preparation he participated as media representative in BMW Motorrad GS Trophy Korea in 2020, mastering both off-road and circuit sports riding. A driver understanding both two and four wheels — his on-track sensibility naturally differs.
Racing dreams harbored nearly 17 years. He first competed in 2024 CJ O’NE Super Race Championship Radical Cup Korea, winning SR1 class season champion, defending the same title in 2025. Two consecutive championships. This year, he’s challenging SR10 class — Radical Cup Korea’s top tier and among Korea’s fastest race cars.
SLDS: Motor-Core Brand Connecting Two and Four Wheels
SLDS (Slades) is a high-end motor-core street fashion brand. CEO, YongIl Kim always felt disappointment about Korean motorsports scene’s reality and limitations but deeply resonated with CEO Chang-woo Lee’s pure passion for developing two-wheel and four-wheel cultures together, becoming Radical Cup Korea’s official sponsor this year.
I’ve enjoyed wearing a SLDS jacket and hoodies since last fall — a brand combining fabric texture quality, meticulous rider-focused details, and refined sophistication working equally as casual wear. At race venues, SLDS(Slades) logos appeared readily among mechanics, officials, and general spectators.
Three drivers, Tai-young Kim, Yong-il Kim, and Su-in Kim are beginning SLDS team’s new challenge.
Anticipating what narrative they’ll write on track.
Sometimes fear isn’t weakness — it’s the precision tool that keeps racers alive at 262 km/h (163 mph).
Originally published in Korean on Motogirl Korea.
