A Complete Carry On Luggage Comparison Guide
Weighing up aluminium suitcase pros and cons is the key step in any carry-on luggage comparison, because how a suitcase is built decides its weight, strength and price. The most confusing part is that "aluminium" can mean two very different things: a full aluminium shell, or an aluminium frame around a plastic shell. This guide compares every type of carry-on construction, explains the difference, and is honest about denting and weight.
Key Takeaways
- A full aluminium suitcase has a metal shell; an aluminium-frame case has a plastic shell with a metal frame.
- Aluminium is the strongest and most secure option, but also the heaviest.
- Full aluminium shells dent, and the dents are permanent.
- For weight-limited carry-on fares, polycarbonate usually makes more sense.
- Check the listing's shell material, not just the word "aluminium" in the title.
Carry-On Luggage Comparison by Construction
Here's a carry-on luggage comparison of the five main ways suitcases are built. Weights are typical for a carry-on and vary by model.
| Construction | Typical carry-on weight | Strength | Closure | Expands? | Price |
|---|---|---|---|---|---|
| Full aluminium shell | Often about 4 to 5 kg | Very high; dents but rarely breaks | Latches | No | Premium |
| Aluminium frame with polycarbonate shell | About 3.5 to 4.5 kg | High; shell flexes, frame can bend on a hard corner hit | Latches | No | Mid to high |
| Zipped polycarbonate | About 2.5 to 3.5 kg | Good; flexes and springs back | Zip | Sometimes | Mid |
| ABS or ABS and PC blend | About 2.5 to 3.5 kg | Fair; can crack | Zip | Sometimes | Budget |
| Softside nylon or polyester | About 2 to 3 kg | Low crush protection | Zip | Usually | Budget to mid |
What this means for carry-on
Many international airlines limit carry-on bags to about 7 to 10 kg. A 4 to 5 kg aluminium suitcase leaves only a few kilograms for your belongings, while a 2.5 kg polycarbonate case leaves far more. For carry-on size limits by airline type, see our guide to the best suitcases and carry-on sizes.
Full Aluminium Shell vs Aluminium Frame
This is the distinction buyers most often miss, and it's what separates mid-priced cases from premium ones.
| Full aluminium shell | Aluminium frame | |
|---|---|---|
| What's metal | The entire shell | Only the frame around the opening |
| Shell material | Aluminium or aluminium alloy | Usually polycarbonate, sometimes other plastics |
| Weight | Heaviest | Lighter, but heavier than zipped cases |
| Dents | Shell dents permanently | Shell flexes back; the frame can bend |
| Price | Premium | Mid-priced to premium |
| Look over time | Dents and scuffs build character | Shell scuffs; frame stays neat unless bent |
How to tell them apart
Read the specifications, not the title. A full aluminium suitcase lists aluminium or aluminium alloy as the shell or exterior material. An aluminium-frame case lists the frame as aluminium and the shell as polycarbonate or another plastic. If a listing says "aluminium" but names a plastic exterior, it's a frame case. Only then do you know which kind of aluminium suitcase you're buying.
Aluminium Suitcase Pros and Cons
Here are the aluminium suitcase pros and cons, honestly weighed.
The pros
- Strength: a full aluminium shell resists crushing and rarely cracks or breaks.
- Security: frame latches are much harder to force than zips.
- Weather resistance: a latched metal or framed case keeps out rain better than a zip.
- Longevity: a well-made aluminium suitcase can last many years.
- Look: many people love how an aluminium suitcase ages.
The cons
- Weight: the heaviest carry-on option, a real cost under weight limits.
- Dents: full shells dent permanently from knocks and baggage handling.
- No expansion: latched cases can't expand for the trip home.
- Price: full aluminium is the most expensive construction.
- Frames can bend: a hard drop on a corner can kink a frame and misalign the latches.
The Honest Truth About Denting
Most descriptions skip this. A full aluminium suitcase will dent: aluminium bends rather than flexing back, so every hard knock leaves a mark. The dents are usually cosmetic and don't stop the case working, and many owners see them as character. That's the main trade-off of an aluminium suitcase. If you want a case that looks new for years, polycarbonate is the better choice, because it flexes under impact and springs back.
Frame damage is the one to watch
On an aluminium-frame case, the shell rarely dents, but the frame can bend if the case lands hard on a corner. A bent frame can stop the latches lining up. Handle framed cases with care, and check how the latches close before you buy.
Aluminium vs Polycarbonate for Carry-On
In a carry-on luggage comparison, polycarbonate usually wins for most travelers: it's lighter, flexes back after impacts, and costs less. Aluminium wins for travelers who value strength, security and longevity over weight, and who rarely face strict carry-on weight limits. An aluminium-frame polycarbonate case is the middle ground: the shell's light, flexible protection with the frame's secure latches. For the wider comparison, see how to choose between hardside and softside luggage.
Who Should Choose Which?
Here's who each type of aluminium suitcase, or an alternative, suits best.
- Frequent business traveler, rarely weighed: an aluminium-frame case for security and a smart look.
- Budget or weight-limited airline flyer: zipped polycarbonate or softside.
- Buy-once, keep-forever traveler: a full aluminium suitcase, accepting the dents and weight.
- Overpacker: a zipped case that expands, since latched aluminium cases don't.
Caring for Aluminium Luggage
Wipe the shell with a soft, damp cloth and mild soap, and dry it well. Keep the latches free of grit, and close them gently rather than forcing them. Store the case somewhere dry. Don't try to hammer out dents yourself, since that often makes them worse. Good care keeps any aluminium suitcase working for years.
Aluminium-Frame and Carry-On Luggage From Global Swanky
Here's our carry-on luggage comparison applied to our range, with honest notes on construction. Our aluminium models are aluminium-frame cases rather than full metal shells. Browse more in the Global Swanky Luggage & Travel Bags collection.
1. Aluminium Frame PC Trolley Suitcase
The Aluminium Frame PC Trolley Suitcase is from $277 for the 20 inch carry-on, with a polycarbonate shell on an aluminium frame, TSA lock and front opening, in 20 to 28 inch sizes. About 5 kg, varying by size.
2. Front-Opening Aluminium Frame Suitcase
The Front-Opening Aluminium Frame Suitcase is from $278 for the 20 inch, with an aluminium frame, TSA lock and front opening for quick access to a laptop or documents, in 20, 24 and 27 inch sizes.
3. Aluminium-Magnesium Alloy Frame Suitcase
The Aluminium-Magnesium Alloy Travel Suitcase is $291, with a riveted aluminium-magnesium alloy frame, a PET and PE shell and a TSA lock, in 20 to 28 inch sizes. It's a frame case, not a full metal shell.
4. Durable TSA Lock Travel Suitcase
The Durable TSA Lock Travel Suitcase is from $68.55, a lighter zipped ABS and PC case with an expansion layer, for travelers who want flexibility over a frame.
Frequently Asked Questions
What is an aluminium frame suitcase?
A suitcase with a plastic shell, usually polycarbonate, and a metal frame around the opening that closes with latches instead of a zip. It's more secure and rigid than a zipped case, and lighter and cheaper than a full aluminium shell.
Is aluminium luggage worth it?
For frequent flyers who check bags and want maximum strength, security and a long life, it can be. For carry-on, especially with a 7 to 10 kg weight limit, its extra weight is a real cost, so many travelers are better served by polycarbonate.
Aluminium vs polycarbonate luggage: which is better?
Polycarbonate is lighter and flexes back after impacts, so it suits most travelers and carry-on. Aluminium is stronger and more secure but heavier and dents permanently. An aluminium-frame polycarbonate case sits in between.
Do aluminium suitcases dent?
Yes. Full aluminium shells dent from knocks and baggage handling, and the dents are permanent, though they rarely affect use. Many owners accept them as character. Aluminium frames can also bend if dropped hard on a corner, which can misalign the latches.
How durable is a metal suitcase?
Very durable in the sense that it rarely cracks or breaks, and a well-made metal case can last many years. It will collect dents and scratches, and like any suitcase, its wheels and handle are usually what wear out first.