United by Blue (R)evolution 25L Convertible Carryall vs. Timbuk2 Scheme

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

United by Blue (R)evolution 25L Convertible Carryall

Capacity25 L
Weight0 kg
Dimensions39×34×13 cm
Airline fit96%
Price$120

Feature by feature

United by Blue (R)evolution 25L Convertible CarryallFeatureTimbuk2 Scheme
Storage
N Compression N
None Expanded Capacity None
0 Opening 1
front Passport side
N Passthrough Y
Carry
hideable Backpack hideable
N Hip Belt N
removable Sternum Strap removable
Inside
15in Laptop 15in
2 Main Compartments 6
N Organizer N
Outside
× Hard Shell ×
N Rain-fly N
2, side Water Bottle Holder N
Y Water Resistant Y
Material

Timbuk2 Scheme

Front facing view of the Timbuk2 Scheme
Capacity21 L
Weight1.2 kg
Dimensions43×30×14 cm
Airline fit95%
Price$180

Key differences between the United by Blue (R)evolution 25L Convertible Carryall and Timbuk2 Scheme

Both have: backpack straps, sternum strap, 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. 179 accept both. 2 accept only the United by Blue (R)evolution 25L Convertible Carryall, and 1 accept only the Timbuk2 Scheme.

Only the United by Blue (R)evolution 25L Convertible Carryall fits

VivaColombia, Volaris.

Only the Timbuk2 Scheme fits

Air Niugini.

United by Blue (R)evolution 25L Convertible Carryall vs. Timbuk2 Scheme: which should you pack?

The United by Blue (R)evolution 25L Convertible Carryall carries 4L more than the Timbuk2 Scheme (25L vs. 21L), and the two are closely matched on weight. For carry-on flexibility, the United by Blue (R)evolution 25L Convertible Carryall fits 96% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the United by Blue (R)evolution 25L Convertible Carryall; if you want to travel lighter, the Timbuk2 Scheme is the better call.