Assegai 29 X 2.50 3C Terra Exo Tr Fold 60Tpi: World Cup Champion Greg Minnaar's signature tyre. The Maxxis Assegai tire is named after the iron-tipped spear used by the Zulu people of South Africa. Greg Minnaar, a native of South Africa, thought it was a fitting name for a tire ready to do battle on the mountain. The tall knobs punch through dust and loam to find traction, but also offer support and confidence on wet roots and rocks. While other tires excel only in certain conditions, the new Maxxis Assegai is built to go fast everywhere. EXO An extremely cut-resistant and abrasion-resistant material added to the sidewalls of select mountain tires. This densely woven fabric is also lightweight and highly flexible, ensuring that the performance of the tire remains unaffected. 3C MaxxTerra An intermediate compound configuration used in select mountain tires. 3C Maxx-Terra is softer and offers more traction than 3C MaxxSpeed, yet provides better treadwear and less rolling resistance than MaxxGrip.