The Macro TCS Tubeless Tire runs a high-volume casing with wider-spaced, more aggressive knobs, built for the loose, rocky, and technical terrain that a standard gravel tread can't hold onto. That extra volume and knob spacing give the tire room to bite into chunkier surfaces without packing up, so descents and washed-out corners stay predictable instead of squirrelly. What Our Gearhead(R) Experts Are Saying:"Rougher terrain usually means giving up some efficiency, but the Stromm-shaped sidewalls on this tire don't ask for that trade. I still feel the drag reduction on the exposed stretches between technical sections, so the aero benefit rides along even when the tread is working overtime."