Description of Schwalbe Furious Fred Evolution MTB Folding Tire - AddixSpeed - LiteSkin - 29x2.00 Inches The lightest 29 inch MTB tire of Schwalbe. Is the track drying out? Can you risk a puncture? Is your technical riding skill excellent? OK - you are ready for Furious Fred. Tread design optimized for speed, minimal material, 127-epi-Evo-carcass, ADDIX SPEED Compound. But be aware: It is not an allrounder. Grip is limited and risk of puncturing is high. ADDIX SPEED is the compound for XC race specialists. It catapults Schwalbe's XC tires into a new performance dimension. Here’s the answer for those who’d like to go even faster. There’s only one thing that ADDIX Speed really loves and that’s speed. So the rolling resistance has been chopped yet again. It’s lower than the previous PaceStar, but at the same time ADDIX Speed is more durable and more resilient. LITE SKIN the lightest option. The LiteSkin MTB tires forego SnakeSkin but still have a reinforced bead core. If you don’t mind the extra effort, these tires can also be converted to Tubeless by using a sealing fluid. However, Schwalbe cannot guarantee that LiteSkin tires used with commercially available sealants will be safely and permanently sealed.