315/30R18 Nankang AR-1 98Y XL Semi Slick Track Day Tyre - Road/Street Legal E-Marked List 1B | 315/30 ZR18

315/30R18 AR-1 Semi Slick - Street compliant competition rubber

Chase lap time with confidence. This 315 30 18 AR-1 delivers serious circuit pace with the convenience of being street legal and E-marked. It is a grippy, predictable, extra load XL 98Y-rated semi slick built for fast road use and relentless track day performance. If you want a sticky 18 inch track day tyre that warms up fast, holds temperature and resists fade over long sessions, this is it.

We run these ourselves and our customers love the consistency, steering feel and braking bite. Expect rapid warm-up, strong lateral grip and repeatable performance session after session. Supplied individually - add four to basket for a full set.

Why drivers choose AR-1 in 315/30 ZR18:

• Serious dry grip from a single competition compound with approx 5.5 mm new tread depth
• Street compliant - perfect for driving to the track then pushing hard on circuit
• Robust construction - 100 TW rating, and for 17 inch and larger sizes a Kevlar-reinforced lining for stability on high-load, high-speed circuits
• Sharp steering response and strong braking performance for heavyweight and high-power cars
• Proven in UK club racing - control tyre in multiple series and a podium winner in open-tyre championships
• Motorsport UK List 1B approved with EU tyre labelling

Perfect for:

Track day enthusiasts after semi slick grip, time attack competitors, club racers, and anyone seeking a 315/30/18 street legal track tyre with extra load capability and a 98Y speed rating.

Key details:

• Size: 315/30R18 - 18 inch
• Load/Speed: 98Y XL - Extra Load
• Compound: single competition-focused blend - approx 100 TW
• New tread depth: around 5.5 mm
• Street compliant - E-marked, List 1B
• Range coverage: AR-1 is produced from 13 inch to 20 inch with new sizes added regularly

Setup guidance for best results:

• Operating temperature window: roughly 71 to 104 degrees Celsius
• Camber: typically between -1.0 and -3.0 degrees depending on vehicle and circuit
• Recommended hot pressures by vehicle weight:
  • 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

Fitting notes:

• Align the yellow dot with the valve stem on both alloy and steel wheels for optimal balance
• EU wet grip, efficiency and external noise data available on request

Trusted in competition:

Used as a control tyre in the M3 Cup, 330 Challenge and Classic VW Cup, and a proven podium finisher in series such as CSCC New Millennium and 750MC Club Enduro.

Professional fitting and geometry

Want this semi slick supplied and installed with a track-focused alignment setup? Book with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a quote and availability.

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315 30 18 semi slick, 315/30/18 track day tyre, AR1 315 30 R18, 18 inch racing tyre, street legal semi slick, E-marked competition tyre, extra load 98Y, performance circuit tyre, road legal track tyre, fast road tyre 18 inch.