Ultradynamico Brut: A Hardpack Tire That Splits the Difference
Ultradynamico's new Brut tire slots between slick and knobby. Fast on hardpack, but it's a compromise — here's what that actually means for mixed-terrain rides.
Ultradynamico just added the Brut to its lineup — a 29 × 2.1" tire that sits between the slick Cava and the semi-knobby Rosé. Small, evenly distributed knobs. Fast on hardpack, smoother on pavement than you'd expect from something with tread. If you ride mixed terrain and don't want to swap tires every time the route changes from gravel to singletrack, this is the slot it's aiming for.
Four casing options are planned, but only two ship now: JFF (665g, $75, gumwall) and Robusto (740g, $85, black). The ultralight Race casing (reportedly 590g) and the burlier Rozzo are "coming soon," which in tire-release language means anywhere from next month to next year. If you want the lightest option or the most puncture protection, you're waiting.
Here's the catch: 2.1" is wide enough to feel sluggish if you're running it on a pure road bike or fast gravel rig, and it's narrow enough that you'll feel every rock on chunky trail. This is a compromise tire by design. It works if your rides genuinely mix surfaces — say, 60% hardpack fire road, 30% pavement, 10% dirt singletrack. If your rides are 90% one thing, you're better off with a more specialized tread.
I haven't put miles on it yet, but the spec that matters is tread depth and knob spacing. Ultradynamico says it's between the Cava and Rosé, which suggests minimal rolling resistance on smooth surfaces but not enough bite for loose or wet conditions. If you live somewhere with year-round dry trails and you hate changing tires, it's worth considering. If you ride in the Southeast where it's wet half the year, this probably isn't your tire.
The JFF casing at $75 is the value play here — 665g isn't light, but it's reasonable for a do-it-all tire. The Robusto adds 75g and $10 for durability you may or may not need depending on how sharp your local rocks are. I can't verify how the rubber compound holds up over a few hundred miles, but Ultradynamico's track record with the Cava suggests decent longevity if you're not skidding into every corner.
