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SecondAir Beadlock Replacement Tube


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Excl. Tax: £29.95 Incl. Tax: £35.94

Devon 4x4

Specialist 4x4 vehicle company

4x4 Accessories & 4x4 Spares

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Product Description


Why SecondAir?
When driving your 4 wheel drive offroad it is usual to lower tyre pressures for 2 reasons
1 - For comfort and a smooth ride.
2 - To lengthen or enlarge your tyres footprint which will give you greater traction.

By simply lowering your tyres highway pressure from 38 psi to 14 psi (262 to 96kpa) you increase your tyres footprint by 37% *Click to read Footprint vs Tyre Pressure
This increase in traction enables you to drive to more inaccessible locations. With low pressure, more grip allows you to drive those red clay steep tracks, mould grip allows you to drive those red clay steep tracks, mould a tyre around a rock or give you greater flotation over mud or sand.

However tyre pressures below 18 psi (124 kpa) run the risk of the tyre either rotating on the wheel rim or worse it allows the tyre to completely deflate and come off the rim. This allows the problem of dirt and mud to enter the inner air chamber or come inton contact with the tube (if fitted) thereby damaging the tube or causing resealing tyre bead problems.

This situation is easily overcome by fitting SecondAir a new kind of pneumatic beadlock that fits inside the tyre. SecondAir hold both tyre beads onto the wheel rim and has a separate low profile tube to inflate the beadlock. An easily installed special valve is fitted to the normal air valave hole to inflate the tyre.

Now you have 2 separate air pressures, allowing you to control with confidence the pressure you wish to run in the tyre.

Customers report that even with zero pressure in the tyre due to a puncture, the tyre stayed in position and full control of the vehicle was maintained.

Secondair are an added safety feature to any vehicle.
In the event of a high speed blowout or puncture the SecondAir is unaffected and will continue to hold the tyre to the rim. It also gives the tyre some 'pneumatic effect' when the tyre sits on the beadlock, cushioning the tyre from the rim minimising tyre damage.

SecondAir weigh less then 1.5kg each and being distributed completely over & around the wheelrim inside the tyre present no problem with wheel balance. Being inside the tyre the SecondAir is unaffected by weather or damage by rocky terrain. This feature allows long life for the product.

The beadlock tube pressure can range from 34psi to 48psi (234 to 330 kpa) depending on the degree of terrain difficulty or whether used in competition. SecondAir can easily be fitted to most 1 piece steel rims and tubeless tyres.

Mounting Instructions
The only modification required is the drilling of an additional hole in the rim. The system will fit one piece steel and alloy rims.
SecondAir Preparation Helpful Hints
The extra hole (16mm (5/8th) or 8mm (5/16th) hole, depending on specific instructions for your SecondAir Kit) for the beadlock tube valve should be drilled between 150-200mm. on one side of the original value hole. Drill the hole inboard as far as practicable, this will depend on your wheel offset.
Flatter areas of your wheel rim are the best place for drilling your second valve hole, tight radius curves should be avoided. Make sure the hole is smooth and free of burrs.
Clean the rims sealing edges (where the tyre bead contacts the rim) with a wire brush to remove dirt and flaking paint etc. Check inside the tyre and the outer part of the bead for any foreign body that could cause problems for the tube or sealing of the tyre bead.
SecondAir Mounting Instructions
Fit the special valve to the original valve hole with the slot parallel with rim edge and tighten.
Mount the inner tyre bead to the wheel rim.
Dust the tube and the inside of the SecondAir casing with the powder supplied.
Mount the inner side of the SecondAir casing making sure the side with 2 tabs is facing out. DO NOT use tyre levers etc. Position the 2 tabs near the special valve.
Fit the tube inside the SecondAir with the valve in the new drilled hole and secure with the brass nut.
Fit the outer bead of the SecondAir casing over the rim. Make sure the 2 tabs are positioned on either side of the special valve. The tabs and fabric flap need to be folded inwards under the bead of the casing between the rim and the tube. Ensure the tube is completely tucked in and not showing near the SecondAir bead.
Tighten tube valve brass nut ensuring O-ring is central and covered by concave washer. If O-ring is forced out when tightening, loosen nut, pull valve in direction of area where O-ring was showing and re-tighten.
Inflate the tube (approx 2 psi (14 kpa)), look inside the tyre and check with your hand that the SecondAir casing is even and centrally located and the tube is not visible.
Let the air out, mount the remaining bead of the tyre. Some rims with no or very little offset may require the valve of the tube to be attached to a valve tool to allow the valve to be pushed inside the rim which allows easier fitting and seating of the outer tyre bead. Once fitted correctly pull valve out and screw brass nut, washer and O-ring into place. Depress tyre bead near special valve to ensure the 2 tabs are inside the tyre and not caught between edge of rim and bead.
Inflate to 12-18 psi (83-124 kpa) the SecondAir to assist in seating the tyre beads. (Remember Brass nut is the Beadlock)
Inflate the tyre via the special valve to 12-18 psi (83-124 kpa).
Inflate the SecondAir to 2 psi (14 kpa) above the normal road pressure or a minimum of 34 psi. (234 kpa.)
Inflate the tyre to normal road pressure.
Check for leaks.

For normal on-road driving keep SecondAir beadlock at 2 psi (14 kpa) above the tyres normal pressure.
For off-road use lower the tyre to the desired pressure. Always maintain the SecondAir at the normal on-road pressure.
Never lower SecondAir pressure below 34 psi (234 kpa) or above 48 psi (330 kpa).

In conclusion
With SecondAir properly installed you will have many years of trouble free 4 wheel driving enabling you to travel with confidence knowing your tyres are firmly beadlocked to your rims.
The tyres real potential will have been realized by increasing the tyres footprint 20-55%.

Beadlock Australia P/L cannot be held liable for SecondAir units being incorrectly installed and/or misused in a manner they were not intended. Vehicles driven with low tyre pressure can be less predictable in their on/Offroad handling, drive accordingly.

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