Thunderhill West,
re-solved live.
Willows, California · 2.67 km · 1.66 mi · counterclockwise
Open Thunderhill West in the Racing Line Lab and the browser re-solves the speed profile on the computed racing line as you change bike class, mass, power and grip. Every figure below is a simulation estimate on OpenStreetMap-derived geometry — not a measured lap.
The map and these reference laps are free in the Lab; live solving on this track unlocks with the $29 lifetime all-tracks pass.
Track outline © OpenStreetMap contributors (ODbL)
Reference simulated laps
Stock bike-class presets · warm sport tires, dry track · simulation estimates
| Preset | Sim lap | Avg speed |
|---|---|---|
| Supersport 600 | 1:23.2 | 113.3 km/h |
| Liter bike | 1:23.0 | 113.5 km/h |
| 650 twin | 1:24.5 | 111.5 km/h |
Where the model brakes hardest
Longest simulated brake zones · Supersport 600 preset · estimates, not measured data
Turn 4
107 km/h · 67 mph in → 85 km/h · 53 mph min
Turn 1
138 km/h · 86 mph in → 107 km/h · 67 mph min
Turn 3
115 km/h · 71 mph in → 76 km/h · 47 mph min