The 6.1-inch iPhone 13 Pro and 6.7-inch 13 Pro Max share the same 120Hz ProMotion technology, the same notch design, and nearly identical connector hardware. That similarity tempts shops into stocking one assembly for both models. Here is what actually swaps and what does not, based on fitment tests across both generations of aftermarket panels.
Dimensional Facts First
The 13 Pro panel measures 6.1 inches; the Pro Max is 6.7 inches. No panel physically fits the other chassis — the question is never fit but rather whether one supplier line, one quality tier, and one pricing structure can serve both models to simplify purchasing.
One Line, Two SKUs: The Practical Answer
Most aftermarket factories run the 13 Pro and 13 Pro Max on the same production line with the same driver IC family. Quality behavior — touch latency, brightness, ProMotion support — matches within a supplier brand. Buying both SKUs from one factory is the real efficiency gain, not cross-fitting.
| Attribute | 13 Pro (6.1") | 13 Pro Max (6.7") | Shared? |
|---|---|---|---|
| Panel size | 6.1 inch | 6.7 inch | No |
| ProMotion 120Hz | Yes | Yes | Yes (verify with supplier) |
| Connector bracket | Same geometry | Same geometry | Yes |
| Typical aftermarket failure mode | Dimming at low brightness | Touch ghosting at edges | Different — QC both |
| Bulk price band (2026) | Lower | ~15-20% higher | No |
Failure Patterns Differ Between the Sizes
Field data from our wholesale customers shows the 6.1-inch panels most often fail with brightness instability at low luminance, while 6.7-inch panels lean toward edge ghost touch. When you QC a sample batch, test each size for its own weak point rather than running an identical checklist. If a batch shows both symptoms, reject the whole batch — it indicates shared component drift from the factory.
Stocking Strategy
- Weight inventory toward the Pro Max: it outsells the 13 Pro in repair volume roughly 2:1 in most markets.
- Buy both sizes from the same factory brand so color temperature and touch behavior match across models.
- Keep one spare connector bracket for each size; they are cheap and prevent rework.
Both SKUs, plus cameras and batteries, are listed on our iPhone 13 Pro page and 13 Pro Max page, with screens grouped in the screen collection.
FAQ
Can a 13 Pro Max screen fit a 13 Pro with trimming?
No. Never modify assemblies; the digitizer geometry makes it impossible without destroying both panels.
Do aftermarket 13 Pro panels keep 120Hz?
Quality-tier panels do; entry-grade copies often drop to 60Hz. Confirm ProMotion support in the spec sheet before ordering.
Which size should a small shop stock first?
Pro Max first, then add the 6.1-inch SKU once volume justifies it.