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

Multiply your weight in kg by 2.9. A 70 kg rider needs 203 W. An 80 kg rider needs 232 W. Use the calculator on this page for your exact number. That's the flat-terrain baseline — drafting mid-pack typically cuts effort by 20–25%.

What W/kg is Yumi on Zwift?

Yumi rides at 2.9 W/kg — seventh in the 10-pacer lineup. All RoboPacers weigh 75 kg, putting Yumi's raw output at 218 W on flat terrain.

Is Yumi hard for recreational cyclists?

Yes. 2.9 W/kg is above the FTP of most recreational cyclists. To ride Yumi comfortably for extended periods, you typically need an FTP of 3.5 W/kg or higher. Riders with FTPs between 3.0–3.5 W/kg can manage Yumi for shorter efforts, but will find sustained riding at this pace demanding.

Yumi vs Coco — what's the step up?

Yumi is 2.9 W/kg vs Coco at 2.6 W/kg — a 0.3 W/kg difference. For a 70 kg rider that's 203 W vs 182 W. It's a meaningful jump in sustained effort. Most riders who are comfortable with Coco need several months of targeted training before Yumi becomes a comfortable sustained pace.

What FTP do I need for Yumi?

To ride Yumi sustainably, you'd want an FTP of around 3.5–4.0 W/kg, putting 2.9 W/kg at 73–83% of FTP. With an FTP below 3.2 W/kg, Yumi will be a high-intensity effort rather than a sustainable training pace.

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

Your watts for Yumi

—W

at your weight on flat terrain

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−1 kg

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Your weight

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+1 kg

⛰️ Flat terrain baseline. Yumi uses dynamic pacing: up to +10% uphill, up to −20% downhill. Mid-pack draft typically cuts effort by around 20–25%.

Meet Yumi

★ Fan lore — unofficial & written for fun

Yumi's group doesn't mess around. At 2.9 W/kg she's moved past the point where enthusiasm or stubbornness gets you through — you either have the fitness or you don't. Her riders tend to know their numbers precisely: FTP, weight, current W/kg. They check their power metre the way a runner checks a pace band. Yumi is serious without being intimidating, technical without being cold. She's the pacer for people who've decided cycling is something they actually do, not something they're trying out.

Who suits Yumi

Yumi suits trained cyclists who ride regularly and are in Cat C territory. This is structured training for most people who get here.

Cyclists with an FTP of 3.3–4.0 W/kg looking for sustained endurance work. Yumi sits comfortably in Zone 2–3 for this group.
Riders who've mastered Coco (2.6 W/kg) and are looking for the next challenge upward.
Competitive amateur cyclists using Zwift as winter training — 2.9 W/kg sustained is meaningful race-specific preparation.
Experienced riders on moderate days who want a workout without going into threshold territory.

Yumi is where the conversation about weight starts to matter more seriously. A 5 kg difference in body weight is a 14.5 W difference in the watts needed to hold her pace. Lighter riders have a measurable advantage here — especially on climbs.

What to expect in Yumi's group

Group size

Smaller, committed

Draft benefit

~20–25% mid-pack

Zwift category

Cat C territory

Dynamic pacing

+10% climbs / −20% descents

Yumi's group is smaller and more selective than the pacers below her. Riders who are close to their limit get dropped on climbs. At 2.9 × 1.1 = 3.19 W/kg on the ascent, less-prepared riders will find it a hard burst. Choose your route carefully — a hilly Yumi session is a very different challenge from a flat one.

Compare Yumi against all 10 RoboPacers — see exactly where 2.9 W/kg sits in your training range.

Full Calculator →

Common questions about Yumi

How many watts do I need to ride with Yumi?

Multiply your weight in kg by 2.9. A 70 kg rider needs 203 W; an 80 kg rider needs 232 W. The calculator above gives your exact figure. That's the flat-terrain front-of-group number — mid-pack draft typically cuts this by 20–25%.

Yumi vs Jacques — what comes next?

Jacques rides at 3.2 W/kg — a 0.3 W/kg step above Yumi. For a 70 kg rider that's 203 W vs 224 W. The jump is meaningful, and Jacques represents Cat B territory for most riders. If Yumi feels sustainable, Jacques is a realistic target with consistent training.

Is Yumi suitable for Cat C racing preparation?

Yes, very much so. Cat C typically requires 2.5–3.2 W/kg in Zwift racing, so Yumi at 2.9 W/kg sits right in the middle of that range. Sustained Yumi sessions build the aerobic base that translates directly to Cat C race performance. Add some higher-intensity intervals outside the RoboPacer group for additional race-specific fitness.

What is Yumi's watt output on Zwift?

Yumi produces 218 W on flat terrain. All RoboPacers weigh 75 kg — 75 × 2.9 = 217.5, rounded to 218 W. On climbs this rises to around 240 W; on descents it drops to around 174 W.

Can I use Yumi for Zone 2 training?

Only if your FTP is high enough. To put 2.9 W/kg in Zone 2 (55–75% of FTP), you'd need an FTP of around 3.9–5.3 W/kg — that's elite-level fitness. For most riders targeting Yumi, she'll sit in Zone 3 or even Zone 4 depending on your FTP. That's tempo to threshold work, not Zone 2.

Ready to build serious fitness on Zwift?

Yumi rewards commitment. If you've put the work in, she'll show you how far you've come.

Get Started on Zwift →

Check where Yumi is riding today. Routes rotate regularly.

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