ZRacing 2026 - September: Zwift Racing Powered by DURA-ACE
Stage 4: Loop de Loop
28 Sept - 4 Oct - Watopia
Official event info - signup, full rules and results live with Zwift; we rank the bikes.
Distance
25.0 km
Elevation
288 m
Laps
2
Terrain
Rolling
What bike should I ride for ZRacing 2026 - September: Zwift Racing Powered by DURA-ACE Stage 4?
TT bikes are disabled for this scratch race. Over 2 laps of Loop de Loop (25.0 km), our physics model makes the Specialized Tarmac SL9 with DTSwiss ARC 1100 DICUT 85/Disc the fastest legal combo, finishing in 45:04 (~33.3 km/h).
How this race tends to play out
The month closes with two laps of Watopia's Loop de Loop: 25 km and 289 m, the most climbing of the four stages, though at under 12 m per kilometre it is rolling rather than mountainous. The lap is almost entirely tarmac, so surfaces are a non-issue and the whole question is how much the climbs claw back from a full aero build. Feather and Anvil again.
Race details from the published round guide.
Best bike & wheel combo for this race
This is a scratch race, but the ranking below is computed for a lone rider with no draft at all. Race draft mode adds the draft a typical mid-pack racer measurably gets, calibrated on thirteen real race fields.
Times shown for a 75 kg, 175 cm rider at 225 W - adjust the sliders, or set your profile once.
DTSwiss ARC 1100 DICUT 85/Disc
45:04
est. finish time · 33.3 km/h
Shimano C99/Disc
+0.14s
slower · 33.3 km/h
DTSwiss ARC 1100 DICUT 85/Disc
+0.83s
slower · 33.3 km/h
DTSwiss ARC 1100 DICUT 85/Disc
+0.83s
slower · 33.3 km/h
Shimano C99/Disc
+1.15s
slower · 33.3 km/h
DTSwiss ARC 1100 DICUT 85/Disc
+1.15s
slower · 33.3 km/h
Shimano C99/Disc
+1.49s
slower · 33.3 km/h
DTSwiss ARC 1100 DICUT 85/Disc
+1.56s
slower · 33.3 km/h
Fixed disc wheels (not swappable)
+2.23s
slower · 33.3 km/h
Surface
Every time below is simulated for your weight, height and power over this route’s real, measured elevation data.
Racing a different number of laps, or want this route outside the event? See the full Loop de Loop route analysis.
ZwiftBikes is not affiliated with Zwift. Schedules are curated from public announcements and may lag corrections - always check the official event listing before race day. The bike and wheel recommendations are ours alone.