Fulcrum Racing Zero CMPTZN C19 2-Way Fit Disc Brake Wheelset

The Fulcrum Racing Zero CMPTZN C19 2-Way Fit Disc Brake Wheelset is one of those rare aluminum wheels that doesn't ask you to make peace with a compromise. It is a disc-specific road wheelset engineered from the hub outward — not a rim-brake design quietly adapted for a new era — and the difference is felt the moment you push into a hard corner or lay down power on a climb. Stiff, direct, and tuned for modern tire widths, it sits at the top of what alloy construction can offer.

The C19 designation refers to the 19mm internal rim width, a dimension that shapes the entire riding experience before a single spoke is tensioned. Mounting a 28mm or 32mm tire on a C19 rim produces a rounder, more supported casing profile — one that grips predictably through corners, absorbs road texture without the harshness of an over-inflated narrow setup, and runs at lower pressures without the squirm associated with mismatched tire-to-rim ratios. This is the geometry that modern road tires were designed around, and the Racing Zero CMPTZN honors that.

Flexibility without penalty is the promise of the 2-Way Fit construction. You can run these tubeless — sealing the bead, dropping pressure, and riding with the puncture resistance and compliance that setup affords — or load a tube when conditions or preference call for it. Over the life of a wheelset, that optionality is worth more than it might appear on a spec sheet. Riders who race on weekends and train in all weather don't always want to nurse a tubeless setup through a gravel detour or a borrowed wheel situation. The Racing Zero CMPTZN doesn't lock you in.

Fulcrum Racing Zero CMPTZN C19 Specs at a Glance

• Rim Material: Aluminum alloy
• Internal Rim Width: 19mm (C19)
• Tire Compatibility: 2-Way Fit — tubeless or clincher with inner tube
• Brake Type: Disc brake only
• Rear Spoke Pattern: 2:1 lacing — two drive-side spokes per one non-drive-side spoke
• Color: Black
• Driver Body Options: Campagnolo, HG11 (Shimano / SRAM 11-speed), XDR
• Intended Use: Road cycling, endurance, training, racing

Design Benefits

1. Disc-Specific Structural Engineering: Disc braking shifts braking forces away from the rim and into the hub, which fundamentally redistributes stress across the wheel. Fulcrum engineered the Racing Zero CMPTZN around this load pattern from the start — the spoke counts, lacing geometry, and hub construction are all oriented around how a disc wheel actually works under braking and drivetrain load, not how a rim-brake wheel works with a rotor bolted on.
2. 2:1 Rear Spoke Lacing for Balanced Tension: The rear wheel of a disc-brake drivetrain system carries competing forces — braking torque through the rotor and drivetrain force through the cassette — and conventional equal-count lacing struggles to distribute those loads evenly. The 2:1 pattern, with two drive-side spokes for every one non-drive-side spoke, is designed to equalize tension across the wheel, which translates to a stiffer, more responsive feel and a structure that is intended to hold true over long miles of hard use.
3. C19 Internal Width for Modern Tire Performance: Wider internal rims aren't a trend — they're a structural correction. A 19mm internal width supports the tire casing at a geometry closer to what manufacturers design their tires around, producing a more consistent bead-to-bead profile. The result is better cornering predictability, lower rolling resistance at equivalent pressures, and improved road compliance — all without adding weight or changing the wheel's handling character.
4. Tubeless Readiness Without Sacrificing Versatility: Tubeless setups offer real advantages — lower pressures, self-sealing puncture protection, reduced rolling resistance — but they also require commitment to a setup routine. The 2-Way Fit rim design lets you run tubeless when you want those benefits and revert to a conventional clincher with a tube when simplicity matters more. That adaptability makes this wheelset a genuinely practical choice for riders who use their bikes across varied conditions and contexts.
5. Driver Body Options Across Major Drivetrain Standards: Available with Campagnolo, HG11, and XDR driver bodies, the Racing Zero CMPTZN integrates cleanly with the most current road drivetrain standards. Whether you're running a Shimano 11-speed group, a SRAM AXS setup with an XDR cassette, or a full Campagnolo build, there's a configuration that fits without adapters or workarounds.

Final Take

The Fulcrum Racing Zero CMPTZN C19 is built for the rider who wants the directness and durability of a well-made aluminum wheel without surrendering anything to disc-era engineering demands. It suits training riders who log serious miles, club racers who want a wheelset that can handle race day and the Tuesday evening group ride alike, and anyone who has chosen alloy deliberately — for its feedback, its repairability, or simply because they know it works. This is a disc tubeless wheel that earns its place at the top of the alloy category without needing to apologize for not being carbon.