Tom Bihn Synapse 25 vs. Deuter Transit 40
Two carry-on travel backpacks, compared spec for spec.
Tom Bihn Synapse 25
| Capacity | 25 L |
| Weight | 0.8 kg |
| Dimensions | 51×34×23 cm |
| Airline fit | 71% |
| Price | $250 |
Feature by feature
| Tom Bihn Synapse 25 | Feature | Deuter Transit 40 |
|---|---|---|
| Storage | ||
| N | Compression | Y |
| None | Expanded Capacity | None |
| 0 | Opening | 0 |
| front | Passport | front |
| N | Passthrough | N |
| Carry | ||
| Y | Backpack | hideable |
| removable | Hip Belt | hideable |
| removable | Sternum Strap | |
| Inside | ||
| 15in | Laptop | 15in |
| 6 | Main Compartments | 6 |
| Y | Organizer | N |
| Outside | ||
| × | Hard Shell | × |
| N | Rain-fly | N |
| 1, front | Water Bottle Holder | |
| Y | Water Resistant | Y |
| Material | |
| 200 denier Halcyon/nylon ripstop fabric lining 400 denier nylon lower back | 600d Polytex |
Deuter Transit 40
| Capacity | 40 L |
| Weight | 1.9 kg |
| Dimensions | 56×34×25 cm |
| Airline fit | 25% |
| Price | $150 |
Key differences between the Tom Bihn Synapse 25 and Deuter Transit 40
- Compression straps: No on the Tom Bihn Synapse 25; Yes on the Deuter Transit 40.
- Backpack straps: Yes on the Tom Bihn Synapse 25; Hideable on the Deuter Transit 40.
- Hip belt: Removable on the Tom Bihn Synapse 25; Hideable on the Deuter Transit 40.
- Built-in organizer: Yes on the Tom Bihn Synapse 25; No on the Deuter Transit 40.
Both have: passport pocket, laptop sleeve, water resistant.
Which airlines take each bag as a carry-on
We checked both bags against the carry-on size limits of 189 airlines. 48 accept both. 86 accept only the Tom Bihn Synapse 25, and 0 accept only the Deuter Transit 40.
Only the Tom Bihn Synapse 25 fits
Aer Lingus, Aeroflot, Aerolineas Argentinas, Aeromexico, Air Asia, Air Canada, Air Caraibes, Air France, Air India, Air Macau, Air Mauritius, Air Wisconsin, AirAsiaX, Alaska Airlines, All Nipon Airways, Allegiant Air, American Airlines, ANA, Austrian, Avianca , Azerbaijan Airlines, Bahamasair, Bangkok Airways, Biman Bangladesh, Boliviana de Aviacion, Brussels Airlines, Cambodia Angkor Air, Caribbean Airlines, Cathay Pacific, Cayman Airways, Cebu Pacific, China Airlines, CommutAir, Croatia Air, Czech Airlines, Delta Airlines, Dragonair, Ethiopian Airlines, Eurowings, EVA Air, Fiji Airways, Flair Air, Garuda Indonesia, Gol Linhas Aereas, Hawaiian Airlines, Hong Kong Airlines, Iberia, Indigo, Interjet, Iran Air, Japan Airlines, Jet Airways, jetBlue Airways, Jetstar Airways, Jetstar Asia, Kenya Airways, KLM, Kulula, LATAM , LOT Polish, Lufthansa, Mahan Air, Malaysia Airlines, Mango, Mesa Airlines, Norwegian, Oman Air, Peach, Porter Airlines, Qantas Airways, Republic Airways, Royal Jordanian, SAS Scandinavian, Scoot, Sky Airlines, Skywest, Inc., South African Airways, SriLankan Airlines, Swiss Int'l Air Lines, Tiger Airways, Trans States, Turkish Airlines, United Airlines, Vietnam Airlines, Virgin Atlantic, WestJet.
Tom Bihn Synapse 25 vs. Deuter Transit 40: which should you pack?
The Deuter Transit 40 carries 15L more than the Tom Bihn Synapse 25 (25L vs. 40L), while the Tom Bihn Synapse 25 is the lighter pack at 0.8kg (vs. 1.9kg). For carry-on flexibility, the Tom Bihn Synapse 25 fits 71% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Deuter Transit 40; if you want to travel lighter, the Tom Bihn Synapse 25 is the better call.