Home
Back
Roof Rack Load Formula:
| From: | To: |
The roof rack load rating determines the maximum weight capacity for your vehicle's roof rack system. It considers both the vehicle's roof strength and the rack system's capacity to ensure safe transportation of cargo.
The calculator uses the minimum value formula:
Where:
Explanation: The safe load capacity is determined by the weaker component - either your vehicle's roof structure or the roof rack system itself.
Details: Proper load calculation ensures vehicle safety, maintains handling characteristics, prevents roof damage, and complies with manufacturer specifications for safe operation.
Tips: Enter both roof rating and rack rating in kilograms. These values can typically be found in your vehicle's owner manual and roof rack product specifications. Always use the lower of the two values for safe loading.
Q1: Where can I find my vehicle's roof rating?
A: Check your vehicle's owner manual or contact the manufacturer. The rating is often listed in the "specifications" or "rorack rack" section.
Q2: Does this include the weight of the roof rack itself?
A: No, the calculated load capacity is for cargo only. The weight of the roof rack system itself should be considered part of the load, not additional to it.
Q3: What about dynamic vs static load ratings?
A: Roof ratings typically refer to dynamic (moving) load capacity. Static (parked) capacity is usually higher. Always follow the dynamic rating for safety while driving.
Q4: Are there other factors that affect load capacity?
A: Yes, factors like vehicle age, roof condition, crossbar spacing, and load distribution can affect safe capacity. When in doubt, use a more conservative estimate.
Q5: Should I consider wind resistance and aerodynamics?
A: Absolutely. The calculated weight is only one factor. Bulky items create drag that affects fuel economy and vehicle stability, even if within weight limits.