Adam D wrote an answer about Boardman Bikes Elite CXR 9.2 Complete Bike - 2014 on July 31, 2014
You should be able to build that up to close to 8KG. The wheel on that bike are quite heavy and the knobby tires tend to add some weight as well.
If you have any other questions or need help with an order let me know. Adam- firstname.lastname@example.org or 801-736-6396 ext 5630