245/40R15 NANKANG AR-1 92W XL Motorsport Tyres Road Legal (sold individually)

Street‑approved semi slick for serious circuit use

If you live for track days and want a road‑usable, lap‑time‑focused semi slick in a 15 inch fitment, this is the one. The AR‑1 from Nankang delivers ferocious dry grip, rock‑solid stability and superb consistency across heat cycles. Perfect for drivers chasing PBs at sprint events, club racing and open pit‑lane sessions, while remaining legal for the drive to and from the circuit.

We run these on our own builds and our customers rate them for pace, predictability and wear. Expect quick warm‑up, a reassuringly stiff sidewall and a confidence‑inspiring, linear breakaway that lets you lean on the car lap after lap.

Why enthusiasts choose this semi slick

• Serious dry‑grip performance for time attack, track days and club motorsport
• Single compound with 5.5 mm tread depth for repeatable handling and easy setup
• W speed rated and Extra Load construction for stability under heavy braking and high‑G cornering
• MSA List 1B approved, with EU tyre labelling
• Proven in competition: control tyre in M3 Cup, 330 Challenge and Classic VW Cup, plus podiums in CSCC New Millennium and 750MC Club Enduro

Ideal use split

Optimised for 90 percent circuit driving and 10 percent fast road. If your priority is outright pace and consistency in the dry, this tyre delivers.

Key details

• Size: 245/40 R15
• Load and speed: 92W, Extra Load
• Tread depth: 5.5 mm
• Compound: single specification for all sizes

Setup guidance

Dial in the car and unlock the grip:

• Operating temperature window: 71 to 104 °C
• Camber: between −1.0 and −3.0 degrees, depending on vehicle and circuit
• Recommended hot pressures:
  • 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 balance dot with the valve stem on both aluminium and steel wheels for the best initial balance
• EU grip, efficiency and noise ratings available on request

Professional installation

Want it fitted and set up properly with track‑focused geometry and pressures? Book with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a fitting and alignment quote.

Search terms our customers use

15 inch semi slick tyres, 245 40 15 track tyres, 245/40 R15 performance tyre, W rated Extra Load, street legal track day tyres, list 1B circuit tyre, dry grip racing tyre, time attack tyre, club motorsport tyres, fast road semi‑slick.

Sold individually. Images for illustration only.