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How much can I fit on my roof bars?
Posted by Charlotte @ The Roof Box Company on 01 April 2011 09:23 AM

How much can I fit on my roof bars?

Lots of people will want to fit as much as they can on the roof, we have lots of experience in helping you achieve this. You can find some tips and examples to show how much you can fit on your roof bars. You also need to consider your vehicle - never exceed the loading limit for your car (check the handbook) or the roof bars you go for. Your load should never stick out any further than the wing mirrors.

Tips for fitting as much as you can on your roof bars

  • always go for T track aero bars (also known as wingbars or whispbars) – you can use the full length of the roof bar, unlike steel bars. The examples below are all using aero bars
  • consider going for the longest bars you can get for your vehicle
  • ‘Top and tail’ roof mounting bike carriers to take up less space
  • always use T track fittings to mount your roof box or accessory, these are usually either included or available as an optional extra
  • remember that the roof bar fittings inside the roof box are usually around 10cm in from the edge of the box, if you slide the box as far as you can to one side it can even overhang the end of your roof bar to give you extra space
  • if you are carrying kayaks consider stacking them or carrying them on their side
  • it is usually more space efficient to go for a longer box and put skis inside the box rather than going for a separate ski carrier if you have lots of luggage

Some common examples:

110cm aluminium T-track bars – e.g. Prorack PRS15 / Atera 110cm bars

  • 2 x bike carriers and a thin roof box up to 60cm wide – this may be tight!
  • 4 x roof mounting bike carriers

120cm aluminium T-track bars

  • 2 x bike carriers and a roof box max 70cm
  • 1 x bike carrier and a roof box max 90cm
  • 4 or 5 roof mounting bike carriers

127cm aluminium T-track bars

  • 2 x bike carriers and a roof box up to 75cm wide
  • 5 x roof mounting bike carriers

135cm aluminium T-track bars

  • 2 x bike carriers and a roof box up to 85cm wide
  • at least 5 x roof mounting bike carriers
  • a roof box up to around 75cm wide (e.g. Kamei Delphin 470) + a 4 pair ski carrier (e.g Atera Nova 4)

Whispbar Aero-X, flush bars or Thule Edge

The usable space on these bars will be limited by the distance between the feet of these roof bars, sometimes it will only be long enough to fit 2 x roof mounted bike carriers OR a medium width roof box. If you need to carry lots of stuff go for the ‘through bars’ option instead.

Longer Thule SlideBars or Professional 

If you do need bars that are longer then the recommended length it is usually possible to use a longer 'SlideBar' or 'Professional Bar' if you go for Thule bars. The design of this bar allows you to replace the standard bar with a longer slide bar but make sure your bars and/or load do not protrude any further than the wing mirrors.

If your not sure how you are going to carry all your gear please get in touch with us with details on your car and what you need to carry, hopefully we can come up with a few suggestions for you.

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