Can a Factory Power Tailgate Handle a Rear Ladder and Spare Tire Carrier?

Rear ladders, spare tire carriers and overland accessories can make an SUV more practical. However, they also add weight to the tailgate and move its center of gravity farther away from the hinges.

For a Honda CR-V or a similar SUV, this change may exceed the operating range for which the factory power tailgate was designed.

The Short Answer

A factory power tailgate may continue to operate after a rear ladder or spare tire carrier is installed, but normal and safe long-term operation cannot be assumed.

In some modification projects, these accessories may add approximately 30–50 kg or more. The actual increase depends on the carrier design, spare wheel, ladder, mounting brackets and other equipment.

The correct decision must be based on measured vehicle data rather than accessory weight alone.

Why Does Added Tailgate Weight Cause Problems?

A power tailgate system is designed around several original vehicle parameters:

• Tailgate mass

• Tailgate center of gravity

• Hinge geometry

• Actuator mounting position

• F1/F2 force requirements

• Motor operating torque

• Motor current and thermal limits

• Opening and closing speed

• Anti-pinch calibration

When a spare wheel is mounted farther from the hinges, it creates additional torque around the hinge axis.

A simplified relationship is:

Hinge torque = load force × horizontal distance from the hinge

This means that two accessories with the same weight may create very different loads depending on where they are installed.

What Problems May Occur?

An overloaded factory power tailgate may experience:

• Slow or incomplete opening

• Failure to hold the tailgate open

• Unexpected tailgate drop

• Automatic stopping or reversal

• Abnormal motor or transmission noise

• Excessive motor current

• Motor overheating

• Gear or spindle wear

• Deformation of brackets or mounting points

• Premature actuator failure

(https://www.youtube.com/embed/4hmN71B-lE4?si=2lGAlJn-MxSVTiFm)

These symptoms should not automatically be blamed on insufficient strut force. Controller calibration, latch alignment, installation geometry and structural strength must also be inspected.

Are Stronger Struts Enough?

Not necessarily.

Installing higher-force struts without evaluating the complete system can transfer excessive loads to the hinges, brackets, tailgate frame and vehicle body. Excessive spring force may also make manual closing difficult or affect obstacle-detection performance.

A heavy-duty power tailgate solution may require:

• Higher-torque electric actuators

• Correctly selected internal springs

• Reinforced transmission components

• Stronger actuator brackets

• Optimized mounting geometry

• Revised motor-current limits

• Updated opening and closing control logic

• Recalibrated anti-pinch protection

• Controlled movement speed

• Reliable manual emergency operation

What Data Is Required Before Customization?

Before selecting or developing a replacement system, engineers should confirm:

• Vehicle model and production year

• OE strut part number and dimensions

• Complete modified tailgate weight

• Spare wheel and accessory weight

• Accessory mounting position

• Tailgate center of gravity

• F1/F2 opening and closing force

• Actuator mounting coordinates and angles

• Required opening height and operating time

• Vehicle slope requirements

• Available electrical current

• Target operating temperature

• Required durability cycles

What Should Be Tested on the Vehicle?

Component specifications alone are not sufficient. The completed system should be validated on the modified vehicle for:

• Full opening and closing operation

• Hold-position stability

• Incline and side-slope operation

• Motor current and temperature

• Obstacle detection and anti-pinch response

• Manual emergency operation

• Latch engagement

• Height-memory function

• Hinge and bracket loading

• Vibration, dust and water exposure

• Repeated operating cycles

Engineering Conclusion

A Honda CR-V fitted with a rear ladder and spare tire carrier may require more than upgraded electric struts. The complete system must be matched to the modified tailgate weight, center of gravity, structural capacity and control requirements.

TOMASTER develops customized heavy-duty power tailgate systems for overland SUVs, armored vehicles and other modified or professional vehicles. Final actuator selection is based on measured project data and vehicle-level validation.