How many watts do I need to ride with Constance on Zwift?

Multiply your weight in kg by 4.2. A 70 kg rider needs 294 W. An 80 kg rider needs 336 W. Use the calculator on this page for your exact number. That figure is the flat-terrain baseline — drafting mid-pack can reduce actual effort by around 20–25%, though Constance's smaller group means less shelter than pacers like Coco.

What W/kg is Constance on Zwift?

Constance rides at 4.2 W/kg — the highest of all 10 RoboPacers. All RoboPacers weigh 75 kg and are 175 cm tall, which puts Constance's raw output at 315 W on flat terrain.

How does Constance compare to other Zwift RoboPacers?

Constance is the hardest of all 10 RoboPacers at 4.2 W/kg. The next closest is Genie at 3.7 W/kg — a gap of 0.5 W/kg that feels larger in practice because Constance's smaller group provides less consistent draft. She is firmly in Zwift Category A territory.

Riding with Constance on Zwift — How Many Watts Do You Need?

Q: What FTP do I need to ride with Constance?

To ride comfortably with Constance at the front on flat terrain you would need an FTP around 4.5 W/kg or higher. With good mid-pack draft the effective effort drops to roughly 3.2–3.5 W/kg, but Constance's group is small, so sustained shelter is less reliable than with busier pacers. Most riders who train regularly with Constance have an FTP above 4.0 W/kg.

Your watts for Constance

Please enter a weight between 30 and 200 kg.

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at your weight on flat terrain

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⛰️ Flat terrain baseline. On climbs expect more; on descents, ease off. Constance uses dynamic pacing: up to +10% uphill, up to −20% downhill. Sitting mid-pack typically cuts your effort by around 20–25%, though her smaller group means shelter is less consistent.

Meet Constance

★ Fan lore — unofficial & written for fun

Constance is the pacer most Zwifters will never actually ride with — not because they haven't tried, but because 4.2 W/kg is what competitive cyclists produce in races. She's the ceiling. The group around her is small and everyone in it knows what they're doing. There's no peloton chatter, no thumbstorm, no new riders floating in to pad the numbers. Just a tight pack of strong riders holding a number that most people use as their 20-minute max. Her name fits. She doesn't waver.

Who suits Constance

Constance isn't a stepping stone. She's closer to a destination — or a reality check.

Cat A Zwift racers who want a controlled tempo or recovery session below race intensity. At 4.2 W/kg you can run sub-threshold if your FTP is 4.8+ W/kg.
Riders with an FTP above 4.0 W/kg who want a sustained hard effort without the variability of a race.
Anyone who's outgrown Genie (3.7 W/kg) and needs the next challenge. The jump from Genie to Constance is 0.5 W/kg — on paper the smallest-looking gap on the spectrum, but with a smaller group and less shelter it feels larger.
Strong riders doing a structured training block who want a consistent external pacer rather than riding to power targets alone.

If your FTP is around 4.0 W/kg, riding with Constance will be close to threshold from the front. Get into a good position mid-pack early — the draft makes a meaningful difference, and her group is too small for you to recover at the back the way you might with Coco.

What to expect in Constance's group

Constance's group rides differently to most other pacers. The dynamic changes when there are twenty riders instead of two hundred.

Group size

Small — elite riders only

Draft benefit

~20–25% but less consistent

Zwift category

Cat A territory

Dynamic pacing

+10% climbs / −20% descents

With a smaller group, there are fewer riders to rotate through the shelter. If you're at the limit of your ability, you can't rely on a big peloton to soften the effort. Attacks and surges that happen naturally in bigger groups also happen here, but without the safety net of 200 people around you when the pack accelerates.

The route matters more than with other pacers. A flat route like Tempus Fugit gives you a clean watts target. A hilly route with Constance is a different sport — her dynamic pacing pushes hard on climbs, and the group splinters and reforms. Check the RoboPacer schedule before you join.

See your watts for all 10 RoboPacers at once. Useful for gauging where you sit across the full spectrum.

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Common questions about Constance

How many watts do I need to ride with Constance?

Multiply your weight in kg by 4.2. A 70 kg rider needs 294 W; an 80 kg rider needs 336 W. The calculator at the top of this page does it for you. That's the flat-terrain baseline from the front. With mid-pack draft you might be closer to 220–250 W at 70 kg, but shelter is less reliable with a small group.

What FTP do I need to ride with Constance?

To hold on at the front you'd want an FTP around 4.5 W/kg or above. With good draft the effective effort drops to roughly 3.2–3.5 W/kg, which puts comfortable riding within reach at FTP 3.8+ W/kg — but you need to be in a good position to get that shelter. If your FTP is 4.0 W/kg and you're targeting Constance, expect it to be hard work, particularly on climbs.

Why is Constance's group so much smaller than Coco's?

Fewer people in Zwift can sustain 4.2 W/kg for an hour. That's not a criticism — it's a straightforward consequence of where 4.2 W/kg sits in the distribution of cycling fitness. Cat A in Zwift racing typically starts around 4.0 W/kg. Coco at 2.6 W/kg is accessible to a much wider range of riders, which is why her group is usually the largest in the game.

When should I move from Genie to Constance?

When a full session with Genie (3.7 W/kg) leaves you feeling like you had more in the tank. If your FTP has climbed past 4.0 W/kg and Genie feels like a tempo ride rather than a hard effort, Constance is the logical next step. The jump is 0.5 W/kg but feels bigger because the group is smaller and the shelter less reliable. Test it on a flat route first.

Is Constance good for Zone 2 training?

Not for most riders. 4.2 W/kg is well above Zone 2 for anyone with an FTP below around 5.5 W/kg. Constance is a threshold or hard tempo session. If you want proper Zone 2 work, look at Coco (2.6 W/kg) or Maria (2.2 W/kg) depending on your FTP. Constance is for high-intensity days, not aerobic base building.

What is the story behind Constance's name?

Constance was introduced when Zwift redesigned the pace partner system in 2022, replacing the original category-named pacers. The old Cat A pacer was A. Anquetil — a nod to Jacques Anquetil. Constance kept the spirit of relentless top-end pacing but with a name that describes the quality you need to stay with her: the ability to hold extreme effort without flinching.

New to Zwift? Start lower and work up.

Constance is a long-term target for most riders. Get on Zwift, find a pacer that suits you now, and start building.

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Check where Constance is riding today. Routes change week to week.

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