Yes. onRails is a transparent overlay that sits on top of any sim racing title and gives you setup advice built around how the car actually behaves, not a generic settings list. It works from three tools: a Lap Wizard for whole-lap issues, a Corner Wizard for phase-specific problems, and an In-Race Engineer for live, in-session questions.
What makes it an “engineer” rather than a settings database
onRails doesn’t hand you a pre-made setup file. You tell it what the car is doing, when in the corner it’s doing it, and how bad it is. It maps that to a specific, ranked setup change for your car type and track type, the same phase-and-balance diagnosis this whole site is built around: identify the phase, identify the grip imbalance, apply the smallest effective change.
The three tools
- Lap Wizard. Enter your lap time and pick the condition that matches what the car did (general understeer, rear unstable under braking, and so on), plus severity. Optionally add tire temps for a deeper read. Get ranked setup recommendations back.
- Corner Wizard. Pick direction, phase (entry, apex, exit), condition, and severity. This is the entry/apex/exit framework directly, turned into a lookup instead of something you have to hold in your head.
- In-Race Engineer. A quick keyboard-driven questionnaire you can answer without leaving the sim or losing your place in a session. See How Can I Get Setup Advice Without Leaving My Sim?
The bigger picture
This is the same phase-and-balance framework covered across this FAQ, built into a tool instead of something you diagnose from memory. If you’ve been working through Fix Understeer or Fix Oversteer by hand, onRails runs that same process for you.
Related questions
Does onRails use generative AI to write setup advice?
No. The recommendations come from a structured rule set tied to car type, track type, corner phase, and condition, not free-text generation. That’s deliberate: a rule you can trace back to a specific phase and imbalance is one you can trust, unlike open-ended AI text that can sound confident and still be wrong.
Do I need telemetry to use it?
No. Every tool runs on what you tell it, your lap time, the condition you picked, and how severe it feels. See How Do I Learn Race-Car Setup Without Telemetry?
Is this the same as downloading a setup?
No. A downloaded setup is a finished file built for someone else’s car and driving style. onRails diagnoses your car’s specific behavior and tells you what to change and why.