Streamed from the official YouTube channel Out of Spec Testing .
DOES MOUNTING A ROOFBOX BACKWARDS ACTUALLY IMPROVE EFFICIENCY?
Out of Spec Testing
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This video investigates the efficiency impact of mounting a roof box forwards versus backwards on a 2024 Tesla Model 3 Performance. The test involved three legs: roof box mounted forwards, backwards, and finally, no roof box (with crossbars only). The reviewer found that mounting the Tuli Motion XT roof box backwards resulted in a negligible, and slightly worse, efficiency compared to mounting it forwards (a 1.3% difference). The primary takeaway is the significant efficiency penalty of using a roof box at all, with the Model 3 Performance experiencing approximately a 13% decrease in efficiency with the box installed compared to just the crossbars. The reviewer concludes that for this specific roof box, mounting it backwards is not only less efficient but also aesthetically questionable, and advises against it.
Vehicle Specs
| Brand | Tesla |
|---|---|
| Model | Model 3 |
| Year | 2024 |
| Trim | Performance |
| Drivetrain | AWD |
