Gooseneck (Fleetneck) Trailers

Diamond C FMAX212: Fleetneck Gooseneck

Specifications, configurations, and buyer fit for the Diamond C FMAX212 Fleetneck Gooseneck.

The FMAX212 is a current Diamond C model. The published specifications below come from the manufacturer’s spec sheet. Confirm the current numbers with your dealer before you buy.

Published Specifications

GVWR25,900 lb
Empty weight6,250-12,060 lb
Lengths20-44 ft
Width102 in
Axles2x 12,000 lb Lippert
Tires14-ply all-steel radials (upgrade 215/75R17.5 16-ply)

Fleetneck gooseneck flatbed

Read from the manufacturer's published page on July 19, 2026. Options and model-year changes alter these figures, verify the current sheet with the dealer.

Manufacturer Source

Diamond C listed this model family as active when checked on July 19, 2026. Confirm current specifications, options, and local availability directly with the manufacturer and dealer.

View the official Diamond C FMAX212 page →