WTB Macro Tire - 29 x 2.4 TCS Tubeless Folding BLK Light/Fast Rolling TriTec SGWTB Macro Tire 29 x 2. 4 TCS Tubeless Folding Black Light Fast Rolling TriTec SG. Macro reinforces the notion that XC shouldnt be categorized by rigid posts and pinner tires. XC is growing faster by the day and Macro is here to exceed its expectations. Minimal fast rolling tread wraps over a wide casing to increase traction and confidence without added knob weight. Minimal tread overhang also reduces weight while a round tire profile provides smooth