Max Speed With Thule Roof Box

My thule boxes both said 80mph as the max speed.

Max speed with thule roof box.

Most cars were travelling at 140kph. Driving with the roof box wasn t really so bad. Regularly best in test for safety security and ease of use choice of capacity from medium to xx large. Speed should be adjusted to suit the load being carried other parameters such as road conditions wind traffic intensity and so on and of course traffic regulations as well.

Thule can not warranty loads that exceed this limit. I think they key is to load it sensibly and balance the weight. I have inadvertantly crept over that on occasion without any problems. Unless stated otherwise in these instructions do not carry more than 75 kg 165 lbs on thule load carriers.

Aerodynamic drag increases with speed and exceeding the speed rating could effectively exert too much force onto the accessory or the roof rack. Some roof rack accessories such as roof boxes come with a maximum speed warning which shouldn t be exceeded. For safety to your vehicle and rack system obey all posted speed limits and traffic cautions. With a load on the roof the vehicle s driving characteristics its braking performance and its sensitivity to side winds may change.

The only statement that thule has on the speed you should travel while carrying a cargo box on the roof like th615 is the following. Total load cargo weight plus weight of accessories used to carry cargo. Thule recommend that you don t travel any faster than 90 mph which is probably more than your local speed limits anyway. It has a distinctive shape that has been optimized using advanced computer simulation reducing the impact on fuel economy and providing a quiet ride.

With our long tradition of the highest quality you can expect a lot from your thule roof box. Thule load carriers do not increase gutter or roof strength.