Recommended numbers · optional class
Readability first.
Know the wording.
The national Time Trials text deliberately uses a recommendation for numeral sizing. It still requires identification that officials can read.
SCCA Time Trials
at a glance.
Dimensions below refer to the actual character, not the outside panel. Consult the linked official text for the complete provisions.
| Detail | What to plan for |
|---|---|
| Numbers | Generally 8 inches high with a 1¼-inch stroke is recommended. |
| Class marks | Optional. If included, the text specifies at least 4 inches high and a ¾-inch stroke. |
| Position | Numbers must appear on body panels on both sides and remain readable by officials. |
| Contrast | Adequate contrast is required. A shared typeface and color are recommended for numbers and class marks. |
Source: SCCA Time Trials · Car identification. The full rule and your event supplements take precedence over this summary.
PLAN THE WHOLE CAR
Every position.
Accounted for.
Measure a clear area at each location before settling on a layout. A door handle, body crease, trim strip, or small front/rear area can change the available footprint.
Position reference: SCCA Time Trials · Car identification. For magnetic placement limitations, read Magnum’s installation guidance.
Number; optional class adjacent
Number; optional class adjacent
Position list is a planning diagram, not an inspected installation or a scale drawing.
Attachment matters at your event.
The national guidance recommends material appropriate to speed and weather and at least tape on a magnet’s leading edge. Follow the actual event instructions and material supplier’s requirements; tape is not a substitute for flat, full contact.
Before a production proof
- Check your registered number and any class or run-group identifier.
- Confirm current event requirements and required official decals.
- Measure clear width and height on the actual car.
- Record the finish and check the selected attachment material.
We check the actual characters, stroke widths, positions and supplied fit measurements on the production proof. The on-screen car illustration does not complete those checks.
Your registered class.
Use the code on your accepted entry. These links select artwork labels; they do not determine vehicle eligibility. Regional and supplemental classes can be entered manually.
A few useful answers.
Are these exactly the same rules as SCCA Solo?
No. The programs have separate text. In particular, SCCA TT recommends the numeral dimensions and makes class marks optional; Solo publishes its own minimums. Check the rule set for the event you entered. Official reference ↗
Can a magnetic kit work on every car?
No. It needs a suitable magnetic surface and full contact; aluminum, fiberglass, and carbon-fiber panels are not suitable magnetic substrates. Check the actual mounting area and finish. Magnum care and application guidance · Our material guide.
Does this include a guarantee of event compliance?
Our Race Ready service checks number-graphics requirements and provides a correction promise for our documented work. The organizer retains final approval; graphics do not certify vehicle classification, equipment or technical inspection. See our service terms.
Your number, with a plan.
Configure your registered number and class.