NANKANG AR-1. The AR-1 is looking to be a faster, more refined track tyre, aimed at the track enthusiast who is hunting lap times. Using the latest tyre technology, the new AR-1 boasts massive performance for track whilst also being road legal. Available in a growing size range from 15" up to 18". With only one compound option and with all tyres being produced with 5.5mm tread depth, the AR-1 is positioning itself in amongst the greats of the track tyre market. During our own testing in our BMW M3 Cup Car we have seen lap times cut by over 1.5 seconds around Donington vs. the already very good Nankang NS2R.