Corner-by-corner guides, computed.

No. Every number is a physics-simulation estimate: a quasi-steady-state point-mass motorcycle model run over each circuit's real geometry with stated tire, power and drag assumptions. Simulated liter-bike laps were checked against published motorcycle lap records and land within roughly 0–25% of them — the full comparison table is on the methodology page.

Three full guides — Laguna Seca, Barber Motorsports Park and The Ridge Motorsports Park — are completely free. Every other guide shows its three biggest braking-zone corners free, with full data tables on all corners. The $59 all-access pack unlocks every corner of every guide as a download; a single track is $12.

Circuit outlines are derived from OpenStreetMap (© OpenStreetMap contributors, ODbL). The racing line, speeds and brake points are computed on top of that geometry by our simulation — they are estimates, and the guides are independent of any track or series.

No. The guides are reference data for studying a circuit before you ride it. Conditions, traffic, your bike and your skill all differ from the model's assumptions. Always ride within your limits and follow your track organization's instructions.