Buna^® FX 3234A-2 HM is a functionalised high styrene SSBR designed to improve the polymer to filler interaction with the silica filler inside the tread compound. This reduces the hysteresis inside the tread compound thus redusing the rolling resistance of the tire. Traction indicators have also been improved. The product has a Mooney Viscosity of 80 after the addition of 37,5 phr of TDAE oil which is in compliance with the European directive 2005/69/EC.