Get aero.Go faster.Same watts. WattCut is an early-access aerodynamic simulation platform for road cyclists and triathletes.
How it works in 4 steps
0.00 m
Your height
Front
Side
Position comparison
Illustrative
| Position | CdA | 25 km/h (16 mph) | 30 km/h (19 mph) | 35 km/h (22 mph) | 40 km/h (25 mph) | 45 km/h (28 mph) | 50 km/h (31 mph) |
|---|---|---|---|---|---|---|---|
| Hoods, upright | 0.312 | 0 W | 0 W | 0 W | 0 W | 0 W | 0 W |
| Drops | 0.294 | 4 W | 6 W | 10 W | 15 W | 22 W | 30 W |
| Aero hoods | 0.281 | 6 W | 11 W | 17 W | 26 W | 37 W | 51 W |
| Aerobars | 0.270 | 9 W | 15 W | 24 W | 35 W | 50 W | 69 W |
| Aerobars +2 cm | 0.269 | 9 W | 15 W | 24 W | 36 W | 51 W | 71 W |
| Aerobars −2 cm | 0.267 | 9 W | 16 W | 25 W | 38 W | 54 W | 74 W |
- Hoods, upright
- Drops
- Aero hoods
- Aerobars
- Aerobars +2 cm
- Aerobars −2 cm
Create your personal digital body from only two pictures
Front and side, without the bike. Your height sets the scale, the photos give us the shape.
More details0.00 m
Your height
Front
Side
Photograph the positions you want to compare
Two views of each position, on the complete bicycle. Two positions is the minimum — there is no upper limit.
More detailsAdd as many as you are curious about
Every position you photograph is compared against every other one — not against a fixed baseline.
More detailsWe run the simulation and send you a report
Your positions are ranked against each other, and the gaps between them are reported as drag and as watts at real riding speeds.
More detailsPosition comparison
Illustrative
Drag area (CdA) by position Watts saved against your slowest position Illustrative drag area for each position, and watts saved against the slowest Position CdA 25 km/h (16 mph) 30 km/h (19 mph) 35 km/h (22 mph) 40 km/h (25 mph) 45 km/h (28 mph) 50 km/h (31 mph) Hoods, upright 0.312 0 W 0 W 0 W 0 W 0 W 0 W Drops 0.294 4 W 6 W 10 W 15 W 22 W 30 W Aero hoods 0.281 6 W 11 W 17 W 26 W 37 W 51 W Aerobars 0.270 9 W 15 W 24 W 35 W 50 W 69 W Aerobars +2 cm 0.269 9 W 15 W 24 W 36 W 51 W 71 W Aerobars −2 cm 0.267 9 W 16 W 25 W 38 W 54 W 74 W - Hoods, upright
- Drops
- Aero hoods
- Aerobars
- Aerobars +2 cm
- Aerobars −2 cm
Joining the beta list takes an email address and nothing else — no account, no password, nothing charged. Register now and your first simulations come at the early-bird price: €35 and €80 instead of €69 and €159.
Free
Join the list
An email address. Holds your early-bird price on both packs.
€35€69
2 simulations
Compare two positions against each other.
€80€159
5 simulations
Enough to test a change and its variations.
- Joining the beta list is free and takes an email address — no account, no password.
- Registering now secures the early-bird price on both packs.
- 2 wind-tunnel simulations cost €35 during the beta, instead of the intended €69.
- 5 wind-tunnel simulations cost €80 during the beta, instead of the intended €159.
- Prices are total prices in euro. No VAT is added (§ 19 UStG).
- Simulations are computational — WattCut does not book physical wind-tunnel time.
- During the beta, parts of an analysis may be completed manually.
- A place on the list does not guarantee a beta invitation or an immediate analysis.
- Nothing is charged when you join the list.
Beta registration closes 31 October 2026
Free · Email address only · Nothing charged