Shop All Categories. 1 x Nankang 215/45/17 91Y AR-1 Semi Slick Road Legal Track Day Tyre 2154517. The AR-1 is the latest high performance tyre from Nankang which has been developed to be a faster and more refined track day tyre. This evolution of the AR-1 features a Kevlar lining in sizes 17 and larger. This Improves stability at speed and consistency. Improved design for increased stability and consistency, ideal for demanding tracks such as the Nurburgring. Ideal track day tyre or ultimate performance road tyre. Used as a control tyre by the M3 Cup, 330 challenge and Classic VW Cup as well as a podium winning tyre in open tyre series such as CSCC New Millennium and 750MC Club Enduro, proving its on track capabilities. The AR-1 tyre is List 1B approved and is ideal for trackday drivers looking to improve their performance particularly in dry conditions. When fitting, the yellow dot is the lightest part of the tyre so should be aligned with the valve stem on both aluminium and steel wheels to ensure that it is well balanced. Note: adjustments to pressures should be done in small increments at a time. To reduce over steer – Reduce rear pressures or increase from pressures To increase over steer – Increase rear pressures or reduce front pressures To reduce under steer – Reduce front pressures or increase rear pressures To increase under steer – Increase front pressures or reduce rear pressures. MSA List 1B approved. 06.02.2024, 08:20:17. Demon Tweeks was established in 1971 to service the needs of the motorsport competitor and our principals of offering top products, quality, service and rapid availability are as important to us today as they were in the very beginning. We are leaders in the supply of race wear, competition and road tuning parts for cars and bikes. Within a staff totalling over 140 is a dedicated sales team servicing upwards of 3000 telephone and online enquiries received every day from the UK and the rest of the world. Our impressive 140,000 sq. That means no additional charges or surprises when your item arrives. If your parcel is lost or damaged along the way, the GSP protections and policies will cover you. CAN I CHANGE MY ADDRESS ONCE I’VE PLACED MY ORDER? I’VE ADDED A NOTE TO MY ORDER, CAN YOU VIEW IT? As you may require it in the event of a claim with your carrier. Monday – Friday: 8.30am – 5.00pm. Saturday & Sunday: CLOSED. Also, during periods of high demand, there may be additional delays in us responding.