Thule roof-top bike carrier, lockable "mouths" secure around down-tube (approximately regarding 4.5 cm diameter) for secure transportation of your bike; quickly connects to settle or round cross-bars *; includes lock and 2 keys.
In Whistler yet could give Vancouver for significant purchaser.
Cash only kindly.
* appears you could buy Thule adaptor kit for around $16 to hook up to aerobars.