Ortlieb Velocity PS vs. Tom Bihn Smart Alec

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

Ortlieb Velocity PS

Front facing view of the Ortlieb Velocity PS
Capacity23 L
Weight0.79 kg
Dimensions50×30×16 cm
Airline fit92%
Price$150

Feature by feature

Ortlieb Velocity PSFeatureTom Bihn Smart Alec
Storage
N Compression N
None Expanded Capacity None
2 Opening 0
N Passport
N Passthrough N
Carry
Y Backpack Y
removable Hip Belt removable
removable Sternum Strap removable
Inside
15in Laptop 17in
1 Main Compartments 0
Organizer Y
Outside
× Hard Shell ×
N Rain-fly N
N Water Bottle Holder N
Y Water Resistant Y
Material
PS33

Tom Bihn Smart Alec

Front facing view of the Tom Bihn Smart Alec
Capacity26 L
Weight0.9 kg
Dimensions47×30×21 cm
Airline fit74%
Price$190

Key differences between the Ortlieb Velocity PS and Tom Bihn Smart Alec

Both have: backpack straps, hip belt, 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. 138 accept both. 35 accept only the Ortlieb Velocity PS, and 2 accept only the Tom Bihn Smart Alec.

Only the Ortlieb Velocity PS fits

Air Baltic, Air China, Air Malta, Air Niugini, Air Serbia, Air Seychelles, Asiana Airlines, ATA Airlines, Belavia, Blue Air, Bulgaria Air, China Eastern, Emirates Airlines, Enter Air, flybe, Icelandair, InselAir, Juneyao Airlines, Luxair, Meridiana Fly, Nordwind Airlines, Royal Brunei Airlines, Ryanair, S7, Shandong Airlines, Shenzhen Airlines, Sun Express, TAP Air Portugal, TAROM, Tianjin Airlines (A320 & E190), TUI, Ukraine International, VIM Airlines (Closed), Volotea, Xiamen.

Only the Tom Bihn Smart Alec fits

Regional Express, Virgin Australia.

Ortlieb Velocity PS vs. Tom Bihn Smart Alec: which should you pack?

The Tom Bihn Smart Alec carries 3L more than the Ortlieb Velocity PS (23L vs. 26L), while the Ortlieb Velocity PS is the lighter pack at 0.79kg (vs. 0.9kg). For carry-on flexibility, the Ortlieb Velocity PS fits 92% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Tom Bihn Smart Alec; if you want to travel lighter, the Ortlieb Velocity PS is the better call.