Published minimums
Four positions.
One complete kit.
NASA Time Trial identification extends beyond a pair of door panels. Plan the front and rear pieces together with both sides.
NASA Time Trial
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 |
|---|---|
| Side numbers | At least 10 inches high with a 1½-inch stroke. |
| Front and rear numbers | At least 4 inches high. |
| Class markings | 4-inch class designation on both sides, front, and rear. The rules include a corresponding ST-class exception. |
| Number assignment | Use three digits unless NASA TT administration assigned a one- or two-digit number. |
| Contrast | Numbers and class marks must contrast with the car or otherwise remain clearly visible. |
Source: 2026 NASA TT v23.1 · §9. 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: 2026 NASA TT v23.1 · §9. For magnetic placement limitations, read Magnum’s installation guidance.
10-inch number + 4-inch class
10-inch number + 4-inch class
4-inch number + 4-inch class
4-inch number + 4-inch class
Position list is a planning diagram, not an inspected installation or a scale drawing.
Leave room for official NASA decals.
Section 9.3 calls for a NASA decal at the front and rear. Contingency participation or Championships adds one on each side. These official decals are separate from the printed number kit; source them through the appropriate NASA channel.
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.
Is a two-door kit enough for NASA TT?
Not by itself. The cited TT rule includes front and rear numbers and class marks, as well as both sides. The NASA TT configuration therefore shows four identification positions. 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.