275/35R18 NANKANG AR-1 99Y XL Motorsport Tyres Road Legal (sold individually)

Ready to drop your lap times with a street approved semi slick that you can drive to and from the circuit? This 275/35R18 AR-1 is a no-compromise competition radial designed for serious pace and repeatable performance on track while remaining E-marked for UK road use. XL construction with a 99Y load and speed rating delivers the stability, steering precision and confidence fast cars demand.

Why drivers choose AR-1 in 275/35R18

• Sticky semi slick tread for serious grip in the dry and predictable balance at the limit
• XL casing and stiff sidewalls for razor sharp response under heavy braking and high-speed cornering
• Single compound with approx. 5.5 mm new tread depth for consistency and longevity across multiple heat cycles
• List 1B approved for UK club motorsport and track-day use
• Kevlar reinforcement in 17 inch and larger sizes from 2019 production enhances stability on demanding circuits like Spa and the Nürburgring

We run these ourselves at MJ Modifications and our customers love the grip, consistency and confidence they deliver. If you are chasing PBs, time attack pace or club-racing reliability, this size is a proven choice for powerful rear or all-wheel-drive performance cars.

Trusted in competition

Used as a control tyre in one-make series such as the M3 Cup, 330 Challenge and Classic VW Cup, and a podium winner in open-tyre championships including CSCC New Millennium and 750MC Club Enduro. That real-world pedigree translates into reliable pace for your car.

Setup guidance

• Operating temperature window: roughly 71 to 104 degrees Celsius
• Camber baseline: negative 1.0 to negative 3.0 degrees, adjust to wear pattern
• Hot pressures as a starting point:
  • Under 800 kg: 23 to 27.5 psi
  • 800 to 1000 kg: 24 to 32 psi
  • 1000 to 1400 kg: 27.5 to 37 psi
  • Over 1400 kg: 34 to 42 psi
• Mounting tip: align the yellow dot with the valve stem to aid balance on both steel and aluminium wheels

Specs and search-friendly details

• Size: 275/35R18
• Load and speed: 99Y XL extra load
• Type: semi slick, competition radial, UHP track day tyre, R compound style performance rubber
• Road use: E-marked street approved in the UK
• List 1B compliant for motorsport
• EU labelling data available on request
• Price is per tyre, sold individually

Fitting and support

Want professional installation, alignment and track setup advice? Book fitting with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a quote and availability.

Search terms you might know this by: 275 35 18 semi slick, AR1 275/35/18, 18 inch track day tyres, competition tyres 275 35 R18, extra load UHP tyres, time attack tyre, circuit tyres for fast road, E-marked semi slicks.