Tom Bihn

Synik 30

Dimensions: 20 x 13.4 x 8 in
Capacity: 30 L
Weight: 3 lb

Enthusiast option but long for strict personal-item rules

Product image rendered to scale from verified dimensions.

Fit snapshot

How it fits popular airline rules

Across 5 commonly checked rules, Tom Bihn Synik 30 has 5 do not fit.

Fit: 0
Tight: 0
No fit: 5
Unknown: 0

Featured rule

Frontier AirlinesDoes not fit

Purchase options

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Fit by airline

One airline rule at a time

Start with the featured personal item check, then choose another airline below to compare the same reviewed bag dimensions.

Personal item visual check

Frontier Airlines

Does not fit

Visual sizer

Bag vs airline rule

Does not fit

Does not fit. Largest overage: 2 in.

Height

Over by 2 in

Bag 20 in / Rule 18 in

Width

Spare room +0.6 in

Bag 13.4 in / Rule 14 in

Depth

Exact limit

Bag 8 in / Rule 8 in

info: Frontier says personal item size may be checked during boarding

Data status

Audited dimensionsAirline-published rule

This preview compares the reviewed bag dimensions against Frontier Airlines's personal item rule.

Product image rendered to scale from verified dimensions.

Frontier fit details Frontier Airlines rules

JetBluePersonal item · 3 in over · 17 x 13 x 8 inDoes not fit
JetBlue
Does not fit; 3 in over
Bag
20 x 13.4 x 8 in
Rule
17 x 13 x 8 in
Rule source checked 2026-05-28; fit confidence high.
United AirlinesPersonal item · 3.4 in over · 17 x 10 x 9 inDoes not fit
United Airlines
Does not fit; 3.4 in over
Bag
20 x 13.4 x 8 in
Rule
17 x 10 x 9 in
Rule source checked 2026-05-28; fit confidence medium.
American AirlinesPersonal item · 2 in over · 18 x 14 x 8 inDoes not fit
American Airlines
Does not fit; 2 in over
Bag
20 x 13.4 x 8 in
Rule
18 x 14 x 8 in
Rule source checked 2026-05-28; fit confidence high.
Delta Air LinesPersonal item · 4.3 in over · 15.7 x 11.8 x 7.9 inDoes not fit
Delta Air Lines
Does not fit; 4.3 in over
Bag
20 x 13.4 x 8 in
Rule
15.7 x 11.8 x 7.9 in
Rule source checked 2026-05-28; fit confidence medium.

Fit-first product brief

Buying notes

Tom Bihn Synik 30 is tracked here from manufacturer-published with 20 x 13.4 x 8 in, 30 L, and 3 lb. The key question is whether that published footprint leaves enough margin for real packed shape, airline boxes, and comparable bags.

Tom Bihn Synik 30 is best read as a personal-item and under-seat backpack travel bag: 5 do not fit across 5 popular personal item checks tracked here. Frontier Airlines, JetBlue, United Airlines, American Airlines, and Delta Air Lines are the avoid list for this bag on the selected rule.

Reviewed dimensions: 20 x 13.4 x 8 in
Capacity: 30 L
Weight: 3 lb
Source basis: Manufacturer-published
Includes: Does not include wheels and handles
Last reviewed: 2026-05-28

Fit verdict

Primary use case: personal-item and under-seat backpack travel.
Across 5 popular personal item checks tracked here: 5 do not fit.
Frontier Airlines, JetBlue, United Airlines, American Airlines, and Delta Air Lines do not fit this selected rule without changing bags.
Across 5 popular carry-on checks tracked here: 5 fit.

Tradeoffs we can infer

Published dimensions do not include wheels or handles; leave extra real-world margin before relying on a tight airline fit.
Do not assume packed corners, pockets, or bulging fabric stay inside the listed rectangular dimensions.
Manufacturer-published with high confidence is strong enough for comparison, but variant naming still matters at checkout.

Buyer risk notes

Within comparable personal item backpack bags in this catalog, capacity is 4.5 L above the category median (25.5 L); empty weight is 1.1 lb above the category median (1.9 lb).
15 inch laptop support is recorded; laptop packing may reduce usable clothing depth even when outside dimensions fit.
External bottle pockets can push the real outside width beyond the listed footprint when full.
Tom Bihn and Amazon routes are attached; verify the exact model and colorway because collection-level merchant pages can mix nearby variants.

Shopping route

Current shopping routes include Tom Bihn, Amazon. Some links may earn This Bag Fits a commission. Compare the merchant listing against the reviewed dimensions before buying.

Comparable bags

Samsonite Mother Lode Jr Travel Backpack32 L personal item backpack in the same category.Footprint: 19.8 x 13.3 x 7.5 in vs 20 x 13.4 x 8 inCapacity: +2 LWeight: +0.2 lbPrice band: Mid vs Premium Cotopaxi Allpa 28L Travel Pack28 L personal item backpack in the same category.Footprint: 18.9 x 11.8 x 9.1 in vs 20 x 13.4 x 8 inCapacity: -2 LWeight: -0.4 lbPrice band: Mid vs Premium GoRuck GR1 26L26 L personal item backpack in the same category.Footprint: 20 x 12 x 6.8 in vs 20 x 13.4 x 8 inCapacity: -4 LWeight: +0.1 lbPrice band: Premium vs Premium

Record status

Dimensions and source record

These are official manufacturer dimensions reviewed on 2026-05-28; does not include wheels and handles.

Dimensions: 20 x 13.4 x 8 in
Source basis: Manufacturer-published
Includes: Does not include wheels and handles

Audited dimensions

Bag data

Audited dimensions

Last reviewed: 2026-05-28
Dimension confidence: high
Primary source: manufacturer

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