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<p>Trunk or hatch mount racks are the least effective in terms of securing the bicycles against banging each other or the vehicle, weather, the rack falling off on the road, or theft.</p>
<p>Roof and hitch mount racks are usually somewhat more secure, although they can have their own issues (e.g. don’t forget to remove bicycles from the roof before entering a garage; hitch mount racks may need to be removed to open the hatch). Outside the vehicle storage (including empty racks) also increases wind noise and fuel consumption.</p>
<p>Inside storage is usually the best if there are not other cargo or passenger needs for the inside space.</p>