What a Custom Rooftop Tent Sample Fitment Approval Record Must Capture

The approval sheet I get handed most often carries two lines: the vehicle's year, make and model, and the tent model. Someone signs it, the sample is called approved, and fitment is treated as settled. Then the tent reaches a real vehicle and the questions start. What is the bar spread on this rack? What crossbar height and width does this mounting system need? Which component on the rack carries the lowest load figure? None of those values are on the sheet, so the sample goes back to the bench and the launch date moves.

A custom rooftop tent sample should never be signed off on a sheet that names only the vehicle and the tent. Three measured or verified items decide fitment: the bar spread measured on the vehicle, the crossbar height and width the tent's mounting system requires, and the load figure of the weakest rack component. The reference behind those checks is a Thule rooftop tent mounting guide. It applies to the tents and racks that guide covers, and it does not extend to an unknown OEM tent or a rack outside its scope. Read it as a model for how the checks are structured, not as a spec sheet for your sample.

Most Sample Approvals Start With the Wrong Proof

A year, make, model and trim is an identifier. It is not a dimension, so there is nothing on the tent to compare it against. Copy a vehicle name onto a sheet and you have recorded which vehicle the buyer had in mind, not whether the mounting system lines up with the bars sitting on it.

A vehicle-level lookup leaves one dimension out of its answer, and the manufacturer says so itself: its selector does not consider bar spread. Paste that result into an approval record and the same dimension is still missing, with one difference. Now it has a signature under it.

I noticed this on incoming sheets long before I read that guide. Two lines filled, everything else blank, and a note saying the fit was confirmed online. Online confirmation is a starting point for narrowing down a part number. It is not a record of a measurement, and it will not answer the installer who calls you from the shop floor.

How I Check Bar Spread Before Signing Anything

What I check on my own vehicle takes one tool. I run a tape between the two bar positions, then write the value on the sheet next to the bar and foot model rather than next to the vehicle name. The number belongs to the rack as it sits on the vehicle today, and it moves when a foot position moves.

I put the method on the sheet as well, because two people can measure the same rack and mean two different things. Date it, name who took it, and say what the tape ran between. A spread measured last season is not the spread on the vehicle in front of you.

Thule's instruction on this is plain: the vehicle selector does not account for bar spread, so measure your rack's bar spread to confirm compatibility. That instruction is scoped to the guide's own tent and rack systems, and it is why a spread field cannot be filled in from a catalog page.

Crossbar Height and Width Belong in the Record

To mount the tent to the crossbars, the crossbars need a specific height and width, and the tent's instruction manual is the document that confirms the mounting system is compatible with those bars. Height and width, both of them, and the manual settles it.

A custom sample does not have that manual yet. That changes what the field holds. Instead of a confirmed dimension, the sheet carries a document request: name the mounting system the custom model uses, and attach the supplier's sheet stating the crossbar height and width that system needs.

A verbal "it fits standard bars" is not a field value. It gives an installer no dimension to work from and a buyer no document to open, and standard is exactly the word that means something different at every supplier.

Load Rating Goes to the Weakest Component

Bars, feet and fit kits may have different weight capacities, and the component with the lowest capacity determines the rack system's maximum. That sentence kills the single rack-capacity box on most approval templates.

Each component's own figure goes in its own row, and the lowest one gets flagged by name. A blended number hides which part is the limit, and the limit is the only figure that matters when a tent, its occupants and their gear are all sitting on the bars.

Nothing on the tent raises a rack component's capacity. A tent rated higher than the weakest bar does not make that bar stronger, so a file that records only the tent's rating has recorded the wrong component entirely. This comes from the Thule guide and covers the racks it describes. It is not a rule for every rack on the market, and a custom sample needs its own supplier figures in the same rows.

The Fields I Want on Every Sign-Off Sheet

The sheet carries the vehicle's year, make, model and trim; the bar and foot model; the measured bar spread with the date and the name of whoever took it; the crossbar height and width the mounting system requires, with the mounting-system reference; each rack component's load figure with the lowest one flagged; the tent model and serial; and the mounting hardware revision.

Nothing on it is a guess. That is the sheet. If a field can be filled in from a catalog page or from memory instead of from a tape and a supplier document, it does not belong on the approval record, because a value nobody measured is indistinguishable from a value somebody invented.

Attachments follow the same logic: photos of the measurement, the supplier's spec sheet for the mounting interface, and the date the sample was checked against both. Name each one in the file. A line that says "attached" tells a reader nothing about what is attached.

What This Sheet Cannot Prove About a Supplier

The record captures fitment data. It says nothing about whether this supplier can build your version of the tent, at what quantity, at what price, on what lead time, with which tooling, or holding which certification. None of that sits in the file, and none of it can be written in as a promise before the answers come back.

Turn each gap into a question for the RFQ. Which mounting system does the custom model use, and which document states the crossbar height and width it needs? Who measures and signs on the supplier's side, and what name goes on the sample file? What tolerance on bar spread will the supplier accept in writing? Which document proves the mounting interface for this model rather than for a catalog model that happens to look similar?

I have found that these answers arrive as documents or they do not arrive at all. A supplier who answers on a call and never in a file leaves your approval record open, and the sample sits on the bench while the schedule burns.

The Dry Fit I Would Run on the Sample

Suppose a sample arrives with a signed sheet. The check I would run is built to pass or fail against that sheet, not to prove anything new. Set the tent on the bar positions recorded for that vehicle. Compare the tent's mounting system against the recorded crossbar height and width. Re-measure the bar spread and hold it against the number written on the sheet.

Imagine that last step comes back different from the field. Either the vehicle changed, or the rack moved, or the measurement on the sheet was never a measurement. Whichever it is, the file needs a new entry before the sample is released, and whoever signs has a reason to look again at the two checks done before it.

I would write the outcome per field rather than as one word at the bottom. A single "approved" hides which of the three checks was actually performed.

What Would Send the Sample Back

Four findings overturn the fitment conclusion on their own. The measured bar spread sits outside what the mounting system requires. The sheet carries no measurement at all, only a vehicle name. The lowest-rated rack component falls short of what the tent's mounting system needs. The supplier cannot name the mounting system used on the custom model.

Any one of those voids the sign-off, no matter how clean the vehicle line looks or how confident the account manager sounds on the phone.

So the two-line sheet from the start fails at the first field. There is no measured bar spread on it, which means there is nothing to compare, and the review stops there. Hold the sign-off until the spread, the crossbar height and width, and the weakest load figure are measured and written down. If the supplier cannot say which mounting system this custom tent uses, keep holding it.