Not very good when its mounted to a 4wd.
Exceed roof rack load rating.
This is known as the dynamic load rating.
In a sudden stop or collision unsecured cargo could cause personal injury.
While the vehicle is static you can have a roof top tent weighing 40kgs and have the weight of two persons on top equating to more than the maximum 100kgs load listed in the manual.
I ve seen roof racks designed to carry 60kg but it clearly says not suitable for offroad use.
A good rating means that the vehicle s roof strength to weight ratio is at least 4 1 so for example if a vehicle s curb weight is 3000 lbs sorry for the imperial units and its roof has a strength to weight ratio of 4 1 then the roof can support at least 12 000 lbs before it will crush the iihs website also defines marginal.
How not to load your roof rack.
The static weight limit can be higher than the dynamic weight.
Off road load rating driving on dirt uneven or unsealed roads.
If your vehicle roof rating is 80kg your fitting kit s rating is 65kg and your roof racks rating is 100 kg your maximum load rating would be 65kg.
To avoid overloading your vehicle take the vehicle load rating and subtract the weight of the roof rack any accessories and your load.
You will need to add the self weight of the tent plus the self weight of the roof racks and any other gear you store on or inside the tent to make sure you never exceed the max load rating while travelling.
Thule the popular swedish purveyor of all kinds of car and bike racks puts this simple equation on its website.
The maximum load is a motion load so that is the maximum load you can carry while the vehicle is in motion on bitumen roads under normal driving conditions.
If you were to leave sealed roads the maximum load would come down to 32 5 kg 65 kg 50 32 5 kg for clamp mounts and 45 5 kg 65 kg 30 45 5 kg for fixed point track and other mounts.
For custom and unlisted vehicles it is up to the installer to determine the maximum weight for the given application.
If you re heading onto dirt roads a 33 reduction should be applied to the vehicles.
There s a roof rack weight limit for every single rack and set of bars sold along with a set of conditions.
On road load rating driving on sealed roads.
165 lbs limit 40 2 lbs rack accessories 124 8 lbs available load capacity.
When outfitting a proper off road overland vehicle be sure to keep the weight as low as.
Our maximum static weight rating is 600 lbs.
Maximum roof load load rack weight any fitted rack accessories the weight of the load itself what s equally important is to never exceed the weight limit of the weakest link in your roof rack system.
Roof rack load limits are generally reflected in the way they mount to the roof and distribute.
Roof rack cross bars should be evenly distributed.
Cargo rating amount of luggage or gear you can put on your racks and roof rack accessories.
