255/40R17 NANKANG AR-1 98W XL Motorsport Tyres Road Legal (sold individually)

17 inch semi slick circuit tyre - 255 40 17 XL 98W, street legal, sold per tyre

Chase faster laps and rock-solid consistency with this 255 40 17 XL performance trackday tyre. E-marked for the road yet engineered for serious circuit work, it delivers dependable grip, stable handling and repeatable performance session after session.

We use these on our own builds and many customer cars, and the feedback is consistently excellent for track days, club-level racing and fast-road shakedowns.

Why enthusiasts choose it

• Street legal circuit rubber - ideal for mainly circuit use with occasional fast-road driving
• Single compound with approx. 5.5 mm tread from new for predictable wear and consistent lap times
• 100TW construction in 17 inch and above features Kevlar reinforcement for improved stability and consistency on demanding venues including Nürburgring and Spa
• Proven in competition - used as a control tyre in M3 Cup, 330 Challenge and Classic VW Cup, and a podium winner in open-tyre series such as CSCC New Millennium and 750MC Club Enduro
• Motorsport UK List 1B approval for UK club motorsport use
• Load index and speed: 98W XL reinforced for high-load, high-speed track applications

Set-up and mounting guidance

• Yellow balance mark: align the yellow dot with the valve to aid balancing on both steel and alloy wheels
• Recommended operating temperature window: 71 to 104 degrees Celsius
• Suggested static camber: between -1.0 and -3.0 degrees, vehicle dependent
• Target 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
• EU label info on grip, efficiency and noise available on request

Fitment and support

Sold individually. Professional fitting available at MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a fitting quote or tailored trackday setup advice.

Sizing and search-friendly terms

Common searches include: 255 40 R17 track day tyres, 255/40 ZR17 semi slick, 17 inch road legal competition tyre, W rated XL reinforced track tyre, E-marked R compound style tyre, List 1B control tyre, club racing tyres UK, time attack tyres, sprint and hillclimb tyres, 255-40-17 performance tyres.

Available across 13 to 20 inch diameters in the wider range, with new sizes regularly added.