
The angle of the trailer hitch ball is 30 degrees. Below are the precautions to be taken when towing: Less than the total mass of the towing vehicle: When the towing vehicle and the towed RV form a train, the total mass of the towing vehicle is = front axle load + rear axle load (towing vehicle rear axle load + the ballast weight of the towed RV on the towing vehicle), and the total mass of the towed RV B = axle load + the ballast weight of the towed RV on the towing vehicle (involved). When calculating the total mass of the train, the involved must also be included in the total mass. Mass range: In Europe, the involved range is 5% to 7% of the running mass of the towed RV, and it is best to stay within this range. Alternatively, the vehicle's allowable involved range can be found in the manual. During the process of modifying and using the towed RV, because the running mass changes, it is also necessary to pay attention to the changes in the involved at all times.

As an avid enthusiast of towing trailers for travel, I fully understand the importance of proper tow ball angle adjustment. Generally, it should be set slightly upward by about 1 to 2 degrees to ensure the trailer follows the tow vehicle stably during travel, avoiding dangerous bouncing or swaying. If the angle is too low, the trailer may sag and scrape the ground, causing friction damage; if too high, it increases wind resistance and the risk of fishtailing. When towing my RV, I typically use a smartphone level app to measure initial positioning adjustments, then test the trailer's stability on rough roads. Incorrect angles can lengthen braking distance and even cause rollover accidents, so I meticulously calibrate the angle within a 0.5% to 3% slope range before every trip. For safety, consulting the manual and professional guidance is crucial, and regular maintenance of towing equipment should never be overlooked.

From an installation safety perspective, the tow hitch ball should typically remain level or slightly elevated, with an optimal range of 0 to 3 degrees upward. This design accounts for trailer center-of-gravity offset, and proper angle adjustment optimizes traction distribution while preventing front-end lift issues. During measurement, I use a simple leveling tool pressed flush against the ball surface for alignment, noting the need for fine-tuning based on varying trailer loads and road conditions—for instance, 1 degree suffices when unloaded, while heavier loads require slightly higher angles. Neglecting this detail may cause wobbling or detachment risks and increase fuel consumption. Experience shows that post-installation testing with turns and emergency braking is essential—an improperly angled hitch ball can compromise the entire towing stability system. Always verify hardware tightness before installation to prevent angle deviation from loosening.

In DIY trailer setups, I've found the optimal tow ball angle to be 0 to 2 degrees upward. A simple method is placing a level on the hitch surface and adjusting it to horizontal or slightly raised by about 1 degree. In practice, incorrect angles cause trailer bouncing that affects control—for instance, angles above 0 degrees help counteract vehicle momentum, while excessive steepness makes steering difficult. I recommend beginners start with light trailers, using free apps to measure and gradually optimize angles for terrain. Always check the tow ball and hitch connection for stability, as minor misalignments amplify risks. Safety is paramount—taking time to calibrate angles far outweighs accident repair costs.


