215/45R17 NANKANG AR-1 91W XL Motorsport Tyres Road Legal (sold individually)

215/45 R17 AR-1 91W XL semi slick for serious circuit work, street approved

Chasing lap time without giving up legality for the drive home? This 215/45 R17 AR-1 in 91W XL spec is a true track-focused, road-usable semi slick that delivers relentless dry grip, razor-sharp steering feel and superb stability. Price is per tyre.

Built for frequent track day drivers who want consistent performance session after session, the AR-1 blends competition-level traction with the convenience of an E-marked casing. Expect fast warm-up, predictable balance and confidence under braking on everything from tight UK circuits to high-load venues like the Nürburgring and Spa.

Why enthusiasts choose the AR-1

• Street legal and optimised for circuit use. Think 90 percent circuit, 10 percent spirited road.
• Single compound with a moulded 5.5 mm tread depth for repeatable performance and easy rotation strategies.
• 17 inch and above from 2019 production feature a Kevlar reinforcement layer for extra stability and consistency at speed.
• MSA List 1B approved with EU tyre labelling.
• XL construction, 91 load index and W speed rating for strength and reassurance on heavier builds and aero-equipped cars.

Proven in competition

Chosen as control rubber in the M3 Cup, 330 Challenge and Classic VW Cup, and a podium winner in open-tyre series including CSCC New Millennium and 750MC Club Enduro. That real-world pedigree translates into dependable pace on your next track day.

Size and search terms you might know this by

215/45R17, 215 45 17, 215-45-17, 215/45 ZR17, 17 inch semi slick, road legal track day tyre, UHP competition tyre, 100TW.

Our experience

We run AR-1s on our own builds and customer cars. Feedback is consistently positive on dry grip, turn-in bite and heat management across long stints. If you want a tyre that helps you push hard with confidence, this is it.

Setup guidance

• Operating temperature window: 71 to 104 degrees Celsius.
• Camber: aim between -1.0 and -3.0 degrees depending on chassis 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 and balancing

For the best results, align the yellow dot with the valve stem on both aluminium and steel wheels to aid balance. EU grip, efficiency and noise ratings available on request.

Want professional installation and geometry? Book with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a fitting quote.

Good to know

• Sold individually. Add the quantity you need to your basket.
• Ideal for track days, club racing practice and fast-road setups requiring a legal semi slick.
• Available across a broad range from 13 inch to 20 inch to suit multiple platforms.