Problem for today....

Get this bike
Recomend a Cycle Rack for the Car Please-ute.jpg
which is amazing to ride and can carry a whole lot of kit

onto the thule roof rack on my vw polo only issue is the wheel base on the bike is 1m50cm which is about a foot longer than the normal mountain bike frame and it weighs 18kgs unladen.

Any recommendations from any cycling edugeekers out there...?