The fastest bike for The Muckle Yin

23.7 km with the 0.2 km lead-in
282 m of climbing
12.0 m/km climb ratio
3 named climbs, 1 sprint
Surface86.7% tarmac12.3% gravel1.0% cobbles

0 km11.8 km23.7 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

43:24

32.7 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 43 seconds here

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If time-trial frames are allowed

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

TT frames are barred in many races.

41:53

1:31 faster

What's the fastest bike for The Muckle Yin?

ZwiftBikes predicts the Specialized S-Works Tarmac SL9 with Cadex 4-Spoke/Disc is the best bike and wheels for The Muckle Yin in Scotland: the fastest road setup for a 75 kg rider at 225 W, finishing in 43:24 (~32.7 km/h). The Cannondale SuperSix EVO LAB71 Team with Cadex 4-Spoke/Disc is 0.32 s behind. Where TT bikes are allowed, the Canyon Speedmax CFR with Cadex 4-Spoke/Disc is 1:31 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	43:24	fastest	95 / 83	all-round
2	Cadex 4-Spoke/Disc	43:24	+0.32 s	94 / 82	climbing
3	Same frame in another paint: Canyon Aeroad CFR Alpecin Premier-Tech Cadex 4-Spoke/Disc	43:25	+1.02 s	95 / 74	aero
4	Cadex 4-Spoke/Disc	43:25	+1.12 s	93 / 83	all-round
5	Cadex 4-Spoke/Disc	43:25	+1.22 s	96 / 72	aero
6	Cadex 4-Spoke/Disc	43:26	+1.79 s	95 / 75	aero
7	Cadex 4-Spoke/Disc	43:26	+1.89 s	95 / 75	all-round
8	Cadex 4-Spoke/Disc	43:26	+2.04 s	93 / 81	climbing
9	Cadex 4-Spoke/Disc	43:26	+2.14 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

The Muckle Yin is rolling, with 12.0 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 3.2 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: 43 s
Physics model: Dynamic, measured geometry

The course

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

Fastest bike for Sgurr Summit North
Climb · km 8.5 to 10.1
1.6 km · 3.7% 58 m
Fastest bike for Sgurr Summit South
Climb · km 18.1 to 19.1
1.0 km · 3.3% 33 m
Fastest bike for The Clyde Kicker
Climb · km 21.7 to 22.0
0.3 km · 3.6% 11 m
Fastest bike for Champion's Sprint
Sprint · km 23.5 to 23.7
0.2 km · flat

Mapped surfaces; the shares describe one lap.

Surface	Share	Distance	Extra watts
Tarmac	86.7%	20.3 km	-
Gravel	12.3%	2.9 km	-
Cobbles	1.0%	0.2 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.