If it has been sitting very long they are very hard to push. I can't push mine unless I face away from the vehicle, use my legs and rock it to get started. If there is the slightest incline or the wheels are not straight--not a chance. It's a good way to start having back problems. Realistically, it's a two or more person job.

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X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior
Dallas