Tom Bihn Techonaut 30 × 
Allegiant Air personal item
No.
Bag 19.7 x 12.6 x 8 in · Rule 18 x 14 x 8 in · high confidence
Bag reviewed 2026-05-28 · Rule reviewed 2026-05-28
Fit proof
Height
Over 1.7 in
Width
+1.4 in
Depth
Exact
Rendered to scale from the reviewed dimensions above. Packed shape and gate enforcement can still change the outcome.
Why this answer
Tom Bihn Techonaut 30 is larger than the published personal-item dimensions. Pick a smaller alternative for this airline rule.
The selected rule is 18 x 14 x 8 in and the bag record is 19.7 x 12.6 x 8 in.
Next step
Tom Bihn Techonaut 30 is not a strong match for Allegiant Air's personal item rule. Use the alternatives below first, then review merchant dimensions before buying.
Allegiant AirFits this rule with 1 inches of tightest margin.
1 in spare on height, the tightest side
17 x 13 x 6 in
Fits this rule with 0.1 inches of tightest margin.
0.1 in spare on depth, the tightest side
15.4 x 11.6 x 7.9 in
Fits this rule with 1 inches of tightest margin.
1 in spare on depth, the tightest side
16 x 12 x 7 in