The fastest bike for Watt Goes Up Must Come Down

62.5 km with the 1.9 km lead-in
776 m of climbing
12.8 m/km climb ratio
2 named climbs, 1 sprint
Surface90.5% tarmac4.7% dirt4.9% brick and wood

0 km31.3 km62.5 kmThe dashed start is the lead-in, which has no measured profile, so its shape is approximated.

Fastest eligible setup · Standard (Road) · verified data only · Halo bikes hidden

with Cadex 4-Spoke/Disc wheels

1:59:21

31.4 km/h averageestimated for 1 lap with the lead-in

Data: Frame and wheels bot-tested
Upgrades: Ranked at upgrade stage 5, assumed for bikes you don't own
Rough surfaces: Rough surfaces cost this setup about 1:12 minutes here

See the full ranking

If time-trial frames are allowed

Canyon Speedmax CFR with Cadex 4-Spoke/Disc (Time Trial)

TT frames are barred in many races.

1:55:43

3:38 faster

What's the fastest bike for Watt Goes Up Must Come Down?

ZwiftBikes predicts the Specialized S-Works Tarmac SL9 with Cadex 4-Spoke/Disc is the best bike and wheels for Watt Goes Up Must Come Down in Watopia: the fastest road setup for a 75 kg rider at 225 W, finishing in 1:59:21 (~31.4 km/h). The Cannondale SuperSix EVO LAB71 Team with Cadex 4-Spoke/Disc is 0.86 s behind. Where TT bikes are allowed, the Canyon Speedmax CFR with Cadex 4-Spoke/Disc is 3:38 quicker.

75 kg / 175 cm / 225 W / solo; 1 lap, including any lead-in once. Standard (Road); verified only; unowned Halo bikes excluded.

Every setup, ranked

Gap to the fastest. Open a row for its wheels, upgrades and the numbers behind it.

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All columns

#	Frame and wheels	Time	Gap	Aero / climb	Style
1	Cadex 4-Spoke/Disc	1:59:21	fastest	95 / 83	all-round
2	Cadex 4-Spoke/Disc	1:59:22	+0.86 s	94 / 82	climbing
3	Cadex 4-Spoke/Disc	1:59:23	+2.13 s	93 / 83	all-round
4	Same frame in another paint: Canyon Aeroad CFR Alpecin Premier-Tech Cadex 4-Spoke/Disc	1:59:25	+4.14 s	95 / 74	aero
5	Cadex 4-Spoke/Disc	1:59:26	+5.08 s	93 / 81	climbing
6	Cadex 4-Spoke/Disc	1:59:26	+5.25 s	95 / 75	aero
7	Cadex 4-Spoke/Disc	1:59:26	+5.53 s	96 / 72	aero
8	Cadex 4-Spoke/Disc	1:59:26	+5.57 s	95 / 75	all-round
9	Cadex 4-Spoke/Disc	1:59:26	+5.71 s	94 / 78	aero

Something here look wrong? Report it – corrections with a source get folded back into the data.

Why this bike wins here

Watt Goes Up Must Come Down is rolling, with 12.8 m of climbing per kilometre, the kind of course where aerodynamics usually counts for clearly more than low weight. The Specialized S-Works Tarmac SL9 is an all-round frame. Disc or regular wheels is a close call: the Cadex 4-Spoke/Disc is 5.8 s faster than the SwissSide HADRON Ultimate 650, but 0.37 kg heavier.

What the terrain rewards, from its climbing alone: aerodynamics against low weight

Aerodynamics 64%Weight on climbs 36%

Drag area against the stock bike: −0.0360 m²
Mass against the stock bike: −1.59 kg
Rolling resistance change: −0.0003
Time lost to rough surfaces: 1:12
Physics model: Dynamic, measured geometry

The course

1 lap; kilometre positions include the lead-in, ridden once.

Fastest bike for Sunset Sprint Rev.
Sprint · km 13.9 to 14.2
0.3 km · -0.4%
Fastest bike for The Grade KOM
Climb · km 27.6 to 31.2
3.5 km · 8.6% 304 m
Fastest bike for Titans Grove KOM
Climb · km 47.1 to 49.8
2.6 km · 2.2% 57 m

Mapped surfaces; the shares describe one lap.

Surface	Share	Distance	Extra watts
Tarmac	90.5%	54.9 km	-
Dirt	4.7%	2.8 km	-
Brick	3.3%	2.0 km	-
Wood	1.5%	0.9 km	-

Extra watts are what the fastest setup needs to hold its pace on each surface rather than on tarmac, averaged over the ride - they appear once a ranked setup and mapped surface positions are there to simulate .

Dynamic physics model active

Every time below is simulated for your weight, height and power over this route’s real, measured elevation data.