2018 Toyota Tundra bed size
The 2018 Toyota Tundra was sold with 3 bed configurations: the 5.5-foot bed (CrewMax) at 66.7 in long, the 6.5-foot bed (Double Cab) at 78.7 in long, the 8.1-foot bed (Double Cab) at 97.6 in long. Actual inches below — the advertised names round.
All configurations
CrewMax — 5.5-foot bed
Steel beddeck rail system available
| Actual length | 66.7 in |
|---|---|
| Actual width (max) | 66.4 in |
| Width between wheelhouses | 50 in |
| Bed depth | 22.2 in |
| Generation | 2nd gen (XK50) |
| Tonneau cover size class | 5.5 ft class |
What fits: tonneau covers in the 5.5 ft class class listed for the 2018 Toyota Tundra CrewMax with the 5.5-foot bed. Bed mats and liners cut to 66.7 in; a 4×8 sheet lies flat only if the load is under 50 in wide between the wheelhouses.
Shop 5.5 ft class tonneau covers for this truck on Amazon (As an Amazon Associate I earn from qualifying purchases.)
Sources: Toyota - 2019 Tundra Product Information (OEM spec sheet) (checked 2026-10-27). Last verified 2026-10-27. Found an error? Tell us — see our accuracy disclaimer.
Double Cab — 6.5-foot bed
Steel beddeck rail system available
| Actual length | 78.7 in |
|---|---|
| Actual width (max) | 66.4 in |
| Width between wheelhouses | 50 in |
| Bed depth | 22.2 in |
| Generation | 2nd gen (XK50) |
| Tonneau cover size class | 6.5 ft class |
What fits: tonneau covers in the 6.5 ft class class listed for the 2018 Toyota Tundra Double Cab with the 6.5-foot bed. Bed mats and liners cut to 78.7 in; a 4×8 sheet lies flat only if the load is under 50 in wide between the wheelhouses.
Shop 6.5 ft class tonneau covers for this truck on Amazon (As an Amazon Associate I earn from qualifying purchases.)
Sources: Toyota - 2019 Tundra Product Information (OEM spec sheet) (checked 2026-10-27). Last verified 2026-10-27. Found an error? Tell us — see our accuracy disclaimer.
Double Cab — 8.1-foot bed
Steel beddeck rail system available
| Actual length | 97.6 in |
|---|---|
| Actual width (max) | 66.4 in |
| Width between wheelhouses | 50 in |
| Bed depth | 22.2 in |
| Generation | 2nd gen (XK50) |
| Tonneau cover size class | 8.1 ft class |
What fits: tonneau covers in the 8.1 ft class class listed for the 2018 Toyota Tundra Double Cab with the 8.1-foot bed. Bed mats and liners cut to 97.6 in; a 4×8 sheet lies flat only if the load is under 50 in wide between the wheelhouses.
Shop 8.1 ft class tonneau covers for this truck on Amazon (As an Amazon Associate I earn from qualifying purchases.)
Sources: Toyota - 2019 Tundra Product Information (OEM spec sheet) (checked 2026-10-27). Last verified 2026-10-27. Found an error? Tell us — see our accuracy disclaimer.