---
url: "https://onebag.travel/compare/kq4hid7zll/tom-bihn-aeronaut-45l/p1vxa73t99/timbuk2-scheme/"
title: "Tom Bihn Aeronaut 45L vs Timbuk2 Scheme - One Bag Travel"
description: "Tom Bihn Aeronaut 45L vs Timbuk2 Scheme: capacity, weight, dimensions and how many airlines accept each as a carry-on, side by side."
source: "https://onebag.travel/compare/kq4hid7zll/tom-bihn-aeronaut-45l/p1vxa73t99/timbuk2-scheme/"
---
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3.  Tom Bihn Aeronaut 45L vs. Timbuk2 Scheme

# Tom Bihn Aeronaut 45L vs. Timbuk2 Scheme

Two carry-on travel backpacks, compared spec for spec.

## [Tom Bihn Aeronaut 45L](https://onebag.travel/carryon/kq4hid7zll/tom-bihn-aeronaut-45l/)

by [Tom Bihn](https://onebag.travel/carryons/?brands=Tom Bihn)

![Front facing view of the Tom Bihn Aeronaut 45L](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1601602491/carryons/tomaero45_hv7dhp.webp)

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>45 L</td></tr><tr><td>Weight</td><td>1.4 kg</td></tr><tr><td>Dimensions</td><td>56×36×23 cm</td></tr><tr><td>Airline fit</td><td>45%</td></tr><tr><td>Price</td><td>$340</td></tr></tbody></table>

## Feature by feature

| Tom Bihn Aeronaut 45L | Feature | Timbuk2 Scheme |
| --- | --- | --- |
| Storage |
| N | Compression | N |
| None | Expanded Capacity | None |
| 1 | Opening | 1 |
| side | Passport | side |
| N | Passthrough | Y |
| Carry |
| hideable | Backpack | hideable |
| removable | Hip Belt | N |
| removable | Sternum Strap | removable |
| Inside |
| N | Laptop | 15in |
| 5 | Main Compartments | 6 |
| N | Organizer | N |
| Outside |
| × | Hard Shell | × |
| N | Rain-fly | N |
| N | Water Bottle Holder | N |
| Y | Water Resistant | Y |

<table class="cmp-material"><tbody><tr><td colspan="2">Material</td></tr><tr><td>1050 denier ballistic nylon OR ultralight 400d Halcyon/420d nylon ripstop 200 denier Halcyon/nylon ripstop fabric lining</td><td></td></tr></tbody></table>

## [Timbuk2 Scheme](https://onebag.travel/carryon/p1vxa73t99/timbuk2-scheme/)

by [Timbuk2](https://onebag.travel/carryons/?brands=Timbuk2)

![Front facing view of the Timbuk2 Scheme](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1788990446/carryons/timbuk2-scheme-p1vxa73t99.webp)

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>21 L</td></tr><tr><td>Weight</td><td>1.2 kg</td></tr><tr><td>Dimensions</td><td>43×30×14 cm</td></tr><tr><td>Airline fit</td><td>95%</td></tr><tr><td>Price</td><td>$180</td></tr></tbody></table>

## Key differences between the Tom Bihn Aeronaut 45L and Timbuk2 Scheme

-   **Luggage passthrough:** No on the Tom Bihn Aeronaut 45L; Yes on the Timbuk2 Scheme.
-   **Hip belt:** Removable on the Tom Bihn Aeronaut 45L; No on the Timbuk2 Scheme.
-   **Laptop sleeve:** No on the Tom Bihn Aeronaut 45L; 15in on the Timbuk2 Scheme.
-   **Main compartments:** 5 on the Tom Bihn Aeronaut 45L; 6 on the Timbuk2 Scheme.

Both have: passport pocket, backpack straps, sternum strap, water resistant.

## Which airlines take each bag as a carry-on

We checked both bags against the carry-on size limits of 189 airlines. 85 accept both. 0 accept only the Tom Bihn Aeronaut 45L, and 95 accept only the Timbuk2 Scheme.

### Only the Timbuk2 Scheme fits

Aer Lingus, Aeroflot, Aerolineas Argentinas, Aeromexico, Air Baltic, Air Canada, Air Caraibes, Air China, Air France, Air India, Air Malta, Air Mauritius, Air Niugini, Air Serbia, Air Seychelles, Air Tahiti, All Nipon Airways, American Eagle, ANA, Asiana Airlines, ATA Airlines, Austrian, Azerbaijan Airlines, Belavia, Blue Air, Boliviana de Aviacion, Brussels Airlines, Bulgaria Air, Caribbean Airlines, Cayman Airways, China Eastern, Croatia Air, Czech Airlines, easyJet, Emirates Airlines, Enter Air, Ethiopian Airlines, Etihad Airways, Eurowings, Fiji Airways, Flair Air, flybe, Gol Linhas Aereas, Gulf Air, Iberia, Icelandair, Indigo, InselAir, Interjet, Iran Air, Japan Airlines, Jet Airways, Juneyao Airlines, Kenya Airways, KLM, LATAM , Liat Airlines, LOT Polish, Lufthansa, Luxair, Mahan Air, Meridiana Fly, Mesa Airlines, Nordwind Airlines, Norwegian, Oman Air, Pakistan International, Peach, Porter Airlines, Qatar Airways, Ravn Alaska, Regional Express, Royal Brunei Airlines, Royal Jordanian, Ryanair, S7, SAS Scandinavian, Scoot, Shandong Airlines, Shenzhen Airlines, Sky Airlines, Sun Express, Swiss Int'l Air Lines, TAP Air Portugal, TAROM, Tianjin Airlines (A320 & E190), Tiger Airways, TUI, Turkish Airlines, Ukraine International, VIM Airlines (Closed), Virgin Australia, Volotea, WestJet, Xiamen.

## Tom Bihn Aeronaut 45L vs. Timbuk2 Scheme: which should you pack?

The **Tom Bihn Aeronaut 45L** carries 24L more than the **Timbuk2 Scheme** (45L vs. 21L), while the **Timbuk2 Scheme** is the lighter pack at 1.2kg (vs. 1.4kg). For carry-on flexibility, the **Timbuk2 Scheme** fits 95% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Tom Bihn Aeronaut 45L; if you want to travel lighter, the Timbuk2 Scheme is the better call.