LFC-Technology: Lateral Flex Control Technology, revolutionary carcass design, light and heat-resistant structure, use of highest quality racing polyester in the carcass, CCT Technology: "Chipping and Chunking Tread" prevents chipping and breaking out of tread blocks on rocky ground, CCRC Technology: "Chipping & Chunking Resistant Compound", significantly minimises rubber loss due to abrasion, reduces tearing of blocks in extremely hard terrain. NHS: Not for Highway use! Only suitable for racing. Exception: Sizes 80/100-21 + 120/90-18 are ECE + DOT approved. Character: Hard Terrain + Stone Tyre (hard) Type Item Construction diagonal Width 80 Installation front Application Cross, Race track Speed index M Size 80/100-21 Main colour black Tread MX3F hard MX3R hard Cross section 100 Tube marking TT = tube type Load index 51 Inch 21 "