Thunderhill East,
re-solved live.
Willows, California · 4.61 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 | 1:58.7 | 139.3 km/h |
| Liter bike | 1:57.0 | 141.3 km/h |
| 650 twin | 2:02.5 | 134.9 km/h |
Where the model brakes hardest
Longest simulated brake zones · Supersport 600 preset · estimates, not measured data
Turn 15
120 km/h · 75 mph in → 74 km/h · 46 mph min
Turn 16
120 km/h · 75 mph in → 74 km/h · 46 mph min
Turn 1
151 km/h · 94 mph in → 118 km/h · 74 mph min