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UK CB Radio Specialists - Expert Advice, Competitive Prices & knowledgeable staff, Est 1996

Installing CB Into 4x4's   Fitting the Aerial & Mount / Fitting a Magnetic Mount
Fitting a 2-Bolt Rack/Bar Mount   |    Fitting a Bullbar / Roll Cage Mount   |    Fitting a Dome Mount   |    Fitting a Gutter Mount   |    Fitting a PSM-1 Mount   |    Fitting a Roofrack / Roofbar Mount   |    Fitting a Widget Mount   |    Need a longer cable?   |   

Click to download this page as a pdf so you can print it and take it out to your vehicle to refer to when doing the job - a lot easier than trying to look at it on a mobile phone!


You are here : Installing CB Into 4x4's / Fitting the Aerial & Mount / Fitting a Magnetic Mount

In our package deals, you can choose a magnetic mount - the one we normally supply is our "Super Gripper" which is 7 inches in diameter. We also offer an upgrade (for an extra £2.50) a smaller one which is 5 inches in diameter. The idea being that many vehicles like Shogun/Pajero etc have ridges down their roofs which means the 7 inch won't sit flat on the roof with it's entire footprint touching metal, whereas the 5 inch often will fit. While the 7 inch one is the strongest, the 5 inch one still has very strong magnetism and is perfectly capable of holding a large springer or similar aerial on at motorway speeds plus, and through the majority of greenlanes etc with overhanging branches as long as your speed is kept sensible.

This is the 7 inch diameter Supergripper magmount
This is the 7 inch diameter 'Supergripper' magmount
This is the 5 inch diameter AM1035 magmount
This is the 5 inch diameter 'AM1035' magmount
There are a number of other magmounts available, plus some aerials that have been designed for magnetic mounting - this page applies to all of these, the common factor is that they rely on magnetic attraction to hold them onto the vehicle. Installing one of our Magnetic mounts is very easy indeed...

What you need to do to install a Magnetic Mount :
Carefully place the magmount on the surface you want it on - the attraction will be strong so mind your finger tips! Roofs and bonnets are ideal places ... job done!

(There is a way to use a magmount on the roof of an alluminium vehicle like a Land Rover or Range Rover... see further down this page)

You will still need an SWR meter (a basic and easy to use test meter) to make sure your aerial is correctly tuned... most of our aerials (Springers etc) are about the right length to give a good SWR reading if all other factors are ok (some suppliers call this "Pre-SWR'd" which is rather misleading as a good SWR depends on a number of factors, not just the aerials length), but using the meter to check, and fine tune (usually by adjusting the aerials length) if necessary, is essential.

Read our SWR meter guide.


Why we offer the choice of two magmounts:
Quite a few vehicles (Mitsubishi Shogun/Pajero, Suzuki Vitara, Hyundai Sante Fe, Nissan Patrol, to name just a few) have ridges along the roof that would mean the 7 inch magmount wouldn't be making contact across it's full diameter. The 5 inch magmount will often fit the highs or lows of these ridges so the whole magmount is in contact with the roof. This is important as you don't want a magmount bridging a gap for two reasons : A/ - the magmounts' magnetic attraction won't be at it's best as part of it won't be in contact with your roof... B/ - if you have a gap underneath a magmount, it's possible that at motorway speeds the air passing underneath the magmount could exert an upwards force on the mount, and try to pull it off!

Unless you need the smaller magmount because of ridges on your vehicles roof you should choose the larger diameter magmount.


No metal-to-metal earth needed! :
One of the reasons why using a magmount is the easiest way tio mount an aerial is that you DON'T need a metal-to-metal connection to the vehicles body to make an earth (all other mounting methods normally need such an earth/ground connection). This is because the magmount makes the earth through capacitance, due to the magnetic attraction of magnet-to-metal. In fact the Supergripper 7 inch magmount comes with a vinyl pad or rubber boot on the bottom (to prevent scratches).


Using a magmount on the roof :
You should place the magmount as close to the middle of the roof as you can so you get an even distribution of signal going out in all directions. If you place the magmount towards the back of the vehicle, you will get slightly more power being transmitted to (and more signals received from) the front of the vehicle. This will be vice-versa if you mount it at the front of the roof, you'll get more signals to the rear of the vehicle. This directional effect won't be very noticeable, but it will be there so if you can get it in the middle it'll work the best.

Often the easiest way to bring the cable into the vehicle is through the rear door... both the magmounts we offer in our package deals have 5.5m of cable but it's amazing how quickly this can be used up, so if you will be coming in through the rear it would be an idea to purchase our 2m extension lead.

It's worth making a "drip loop" where the cable comes in through your door seal or wherever, so that water drips off the bottom of the loop, instead of coming down the cable into the vehicle.

A 7 inch Supergripper magmount on the roof of a Vauxhall Frontera
A 7 inch Supergripper magmount on the roof of a Vauxhall Frontera
A 7 inch Supergripper magmount on the roof of a family hatchback
A 7 inch Supergripper magmount on the roof of a family hatchback
A 5 inch AM1035 magmount on the roof of a Hyundai Santa Fe - the 7 inch magmount would not fit here
A 5 inch AM1035 magmount on the roof of a Hyundai Santa Fe - the 7 inch magmount would not fit here
A 5 inch AM1035 magmount on the cab roof of a tractor - the 7 inch magmount would not fit here
A 5 inch AM1035 magmount on the cab roof of a tractor - the 7 inch magmount would not fit here


Using a magmount on a bonnet :
Putting a magmount on the bonnet is also a good option for some people, especially on Range Rovers and similar as these often have steel bonnets whereas the roof is alluminium and the magnetic won't stick.
This is also a good way of fitting an aerial on motorhomes etc where the roof is not metal - you can use our Angle Adaptor to get the aerial upright if your bonnet is sloped.

7 inch Supergripper magmount on the bonnet of a Range Rover
7 inch Supergripper magmount on the bonnet of a Range Rover
7 inch Supergripper magmount on the bonnet of a Toyota Land Cruiser
7 inch Supergripper magmount on the bonnet of a Toyota Land Cruiser


Protecting against scratches, scuffs and marks :
Most people with an offroading 4x4 won't be worried about scratches etc but if you have a vehicle that you'd prefer not to mark, theres a few things you can do to minimise these :

  • In the "Roof mounting" section above, theres a photo above of the Supergripper on a hatchback car, you can see the cable stretching out across the roof before it comes in at the back... when driving at road speeds, the cable will move about (oscillate) and over time will scuff the roof underneath it - you can use insulating tape to stop this, either to tape the cable in place so it doesn't move, or run the tape on the roof under where the cable runs so that the cable scuffs the tape and not the roof as it moves about in the wind.
  • If you have a magmount on your roof during the summer months, it's an idea to move it about a bit as the paintwork will fade slightly in the sunlight and you might end up with a slightly darker 7 or 5 inch patch where the magmount has been.
  • When you wash the car, lift the magmount off and wash underneath it when you're washing the roof as crud and "stuff" will accumulate around it and this can leave a ring if not cleaned off when you wash the rest of the car. Just remember to dry it before you replace the magmount as water trapped underneath is not good!
  • When removing the magmount the best way is usually to lift it up by grabbing the aerial and pulling straight up... trying to lever it off sideways can cause scratches and trying to lift it off without an aerial to grip can be pretty difficult
  • (Pretty obvious this :) When you put the magmount on, make sure the roof is absolutely clean, even the smallest bit of grit can scratch when squashed between the magmount and roof.


A way of getting a magmount to work on alluminium roofed vehicles like Land Rovers :
Magnets won't stick to alluminium so you usually can't use them on Series and Defender Land Rovers and Range Rovers, but there is a way - use another magnet below the roof, directly under the magmount on top, to "clamp" the roof between the two magnets. This is usually only practical where the headlining is not fitted, but can be a good way of making a magmount work on these vehicles. You could use the magnet from an old speaker (it'll need to be a sizeable speaker) or get hold of an old or damaged magmount from a carboot sale etc.


Other places you can use a magmount :
As a magmount will stick to anything thats steel, you can put one in all sorts of places :

Here's a magmount on a plate that has been fixed to a rollcage
Here's a magmount on a plate that has been fixed to a rollcage
5 inch magmount fitted to the back of a vehicle, using an Angle Adaptor to get the aerial upright
5 inch magmount fitted to the back of a vehicle, using an Angle Adaptor to get the aerial upright
7 inch magmount on a farm vehicle
7 inch magmount on a farm vehicle
5 inch magmount on a steel plate fixed to the wingtop of a Land Rover
5 inch magmount on a steel plate fixed to the wingtop of a Land Rover


A few more photos of magnetic mounts :

Our 5 inch AM1035 magmount with coins shown to illustrate it's size
Our 5 inch AM1035 magmount with coins shown to illustrate it's size
Our 5 inch AM1035 magmount on the roof of a Toyota Hilux Mk 6
Our 5 inch AM1035 magmount on the roof of a Toyota Hilux Mk 6
Our 7 inch Supergripper magmount on the roof of a Vauxhall Frontera
Our 7 inch Supergripper magmount on the roof of a Vauxhall Frontera
Our 7 inch Supergripper magmount on the roof of a Land Rover Discovery
Our 7 inch Supergripper magmount on the roof of a Land Rover Discovery


Product links:
Supergripper 7 inch Magnetic Mount
AM1035 5 inch Magnetic Mount
4x4 CB Radio Package Deals (all of which have the option of choosing the 7 inch or 5 inch magmount)


More photos of the Supergripper Magnetic Mount
More photos of the AM1035 Magnetic Mount


You are here : Installing CB Into 4x4's / Fitting the Aerial & Mount / Fitting a Magnetic Mount



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