Shop All Categories. 4 x 165/60 R12 71H Yokohama A539 Performance Road Tyre – 1656012 (New). The A539 from Yokohama is an all round sports tyre the successor to the high performance A520 tyre. The A539 has an advanced silica compound to ensure superb traction in the wet and even th emost challenging surfaces, it has been specifically designed to give minimum noise levels and provide a comfortable drive. The use of an asymmetrical tread pattern offers outstanding stability in corners allowing you to enter corners with more confidence and experience a more exhiliarating drive. 11.06.2025, 07:01:01. 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.