The GT12 Atom Rear A Foam 40Sh - 48mm is designed for racers seeking durability and longer-lasting foam for their GT12 tyres. The 'A' foam offers reduced wear rates compared to the Q foam range, making it ideal for longer race sessions or tracks with a high grip and groove, like MB Raceway in the UK. While it may offer slightly lower grip levels compared to other compounds, this can be beneficial on permanent, high-traction tracks where grip management is key. Available in both 37Sh and 40Sh rear options, and compatible with GT12 racing setups. Perfect for those looking to improve tyre longevity without sacrificing performance on grooved or heavily used tracks.