The fastest bike for Spiral Summit

24.0 km with the 0.1 km lead-in
284 m of climbing
11.9 m/km climb ratio
2 named climbs, 1 sprint
Surface93.9% tarmac1.1% dirt5.0% wood

0 km12.0 km24.0 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

44:30

32.4 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 11 seconds 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.

43:06

1:24 faster

What's the fastest bike for Spiral Summit?

ZwiftBikes predicts the Specialized S-Works Tarmac SL9 with Cadex 4-Spoke/Disc is the best bike and wheels for Spiral Summit in Watopia: the fastest road setup for a 75 kg rider at 225 W, finishing in 44:30 (~32.4 km/h). The Cannondale SuperSix EVO LAB71 Team with Cadex 4-Spoke/Disc is 0.82 s behind. Where TT bikes are allowed, the Canyon Speedmax CFR with Cadex 4-Spoke/Disc is 1:24 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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Pick up to 3 setups in their rows to compare them.

All columns

#	Frame and wheels	Time	Gap	Aero / climb	Style
1	Cadex 4-Spoke/Disc	44:30	fastest	95 / 83	all-round
2	Cadex 4-Spoke/Disc	44:31	+0.82 s	94 / 82	climbing
3	Cadex 4-Spoke/Disc	44:32	+1.43 s	93 / 83	all-round
4	Same frame in another paint: Canyon Aeroad CFR Alpecin Premier-Tech Cadex 4-Spoke/Disc	44:32	+1.76 s	95 / 74	aero
5	Cadex 4-Spoke/Disc	44:32	+1.96 s	95 / 75	all-round
6	Cadex 4-Spoke/Disc	44:33	+2.34 s	93 / 81	climbing
7	Cadex 4-Spoke/Disc	44:33	+2.35 s	96 / 72	aero
8	Cadex 4-Spoke/Disc	44:33	+2.37 s	95 / 75	aero
9	Cadex 4-Spoke/Disc	44:33	+2.53 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

Spiral Summit is rolling, with 11.9 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 2.8 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 67%Weight on climbs 33%

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: 11 s
Physics model: Dynamic, measured geometry

The course

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

Fastest bike for Jarvis KOM
Climb · km 10.9 to 12.7
1.8 km · 1.8% 33 m
Fastest bike for Jarvis Sprint
Sprint · km 14.1 to 14.3
0.2 km · -0.1%
Fastest bike for Jarvis KOM
Climb · km 15.8 to 17.6
1.8 km · 1.8% 32 m
Fastest bike for Jarvis Sprint
Sprint · km 18.9 to 19.1
0.2 km · -0.1%
Fastest bike for Volcano KOM
Climb · km 20.3 to 24.0
3.7 km · 3.2% 119 m

Mapped surfaces; the shares describe one lap.

Surface	Share	Distance	Extra watts
Tarmac	93.9%	22.4 km	-
Wood	5.0%	1.2 km	-
Dirt	1.1%	0.3 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.