Racing Line Lab · physics-simulation estimates

Road America,
re-solved live.

Elkhart Lake, Wisconsin · 6.44 km · 4.00 mi · clockwise

Open Road America 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.

COMPUTED LINE · ROAD AMERICA SIM
Road America track map with computed racing line
4.00 MI
Lap
12
Corners
2:19.0
Sim lap · 600

Track outline © OpenStreetMap contributors (ODbL)

Reference simulated laps

Stock bike-class presets · warm sport tires, dry track · simulation estimates

PresetSim lapAvg speed
Supersport 6002:19.0166.6 km/h
Liter bike2:14.2172.6 km/h
650 twin2:27.5157.0 km/h

Where the model brakes hardest

Longest simulated brake zones · Supersport 600 preset · estimates, not measured data

Hard braking · sim

Turn 3

177 m brake zone

117 km/h · 73 mph in → 69 km/h · 43 mph min

Hard braking · sim

Turn 1

147 m brake zone

144 km/h · 89 mph in → 108 km/h · 67 mph min

Hard braking · sim

Turn 10

138 m brake zone

128 km/h · 80 mph in → 87 km/h · 54 mph min

Embed this track

A readonly Lab view — canvas, simulated lap time and a backlink — for your club site or forum post

<iframe src="https://apexlines.app/lab/?track=road-america&embed=1" width="720" height="560" style="border:0;border-radius:12px;background:#0D0E12" loading="lazy" title="Racing Line Lab — Road America simulated racing line"></iframe>

The embed loads https://apexlines.app/lab/?track=road-america&embed=1 — free to use with the attribution left intact.