Hello. 

1. Our racks are NOT designed to take a top box or any hard luggage located to the rear of the mounting bolts. Due to the Tenere design there is no way to support to the rear of this and riding offroad will create heavy forces back there that WILL break a rack. Maximum load to the rear of the rack is a 1 gallon Rotopax fuel can on their mount. 

2. Our racks are really designed as a point to secure soft luggage. We strongly encourage riders to pack light to improve their experience. If you want to take a significant amount of gear loaded to the rear of the bike there are a lot of other options that are designed to take much heavier loads - but they will be a lot heavier.