Thunderhill East,
re-solved live.
Willows, California · 4.60 km · 2.86 mi · counterclockwise
Open Thunderhill East 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 | 1:53.9 | 143.9 km/h |
| Liter bike | 1:52.3 | 146.0 km/h |
| 650 twin | 1:57.7 | 139.4 km/h |
Where the model brakes hardest
Longest simulated brake zones · Supersport 600 preset · estimates, not measured data
Turn 14
104 km/h · 65 mph in → 70 km/h · 44 mph min
Turn 10
124 km/h · 77 mph in → 90 km/h · 56 mph min
Turn 1
161 km/h · 100 mph in → 131 km/h · 81 mph min