Quadbar NZ

Safety first....

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Welcome to Quadbar NZ

At last a safety system for quad bikes that helps protect the rider. Quad bike accidents have claimed 45 lives and caused 17,000 injuries in the last decade mostly in the farming community. This simple device will help save lives.

The Quadbar (TM) is a small unobtrusive, hairpin shaped hoop mounted on the quad bike behind the rider designed to counter some of the risks associated with rollovers.

The Quadbar acts as a Passive Roll Over Protective Structure (PROPS) as opposed to the more commonly known Roll Over Protective Structures (ROPS). A typical ROPS would require a full cage and driver restraint, which are not feasible on a rider active vehicle such as a quad bike.

(click here to see a video demonstration)

The Design

The Quadbar (hoop steel and aluminium tube) is mounted on the tow bar and is telescopically adjustable at the base. A support mount is attached to the rear rack, where the bar passes through sliding collars (bushes), which subsequently allow the suspension to move freely. The use of the tow bar is not affected by attachment of the Quadbar.


The Quadbar is a device designed to reduce the risk of injury caused by quadbike rollovers. Research has identified injury caused by the pinning of the rider to be of particular concern. (ref: Risk and preventive factors for fatalities in All-terrain Vehicle Accidents in New Zealand, 2009. Boaz Shulruf, Andrew Balemi)

Also injuries from quadbike backflips are particularly common (ref Coronial Inquest – Melb)

The Quadbar has been designed to help prevent the operator from being pinned beneath an overturned quadbike. It is also designed to reduce crushing and pinning injuries and fatalities in cases of quadbike back flip.

The Quadbar has particular application where usage is generally considered safe, and the rollover is inadvertent, such as work place environments like farms and forestry and some limited types of recreational use like touring

The Quadbar cannot be fitted to the sports type bike where the operation is generally considered risky.


The Quadbar is essentially a bolt on attachment. Currently 1 kit should fit most bikes that are fitted with a tow bar & rack. However some of the less popular bikes may require variations of the brackets.

* Hoop Steel and Aluminium tube
* Horizontal variance between tow bar & rack 180 – 260 mm
* Overall height 1400 mm
* Approximate height above seat level 730 mm
* Weight 8 kg
* Padding 9 mm close cell UV stabilized
* Fittings laser cut for accuracy and consistency
* Fittings zinc plated

Side Roll

Testing has shown that the Quadbar can be effective in preventing a quadbike from rolling more than a ¼ roll. For example during testing, the Yamaha Moto 250 completed 2 full rolls on a 20 degree or 36% slope without a Quadbar, but only ¼ of a roll with a Quadbar fitted. When the momentum is increased past the point when the Quadbar prevents more than a ¼ roll, the testing showed that the quadbike continued to roll past ½ roll, and in most cases ¾ roll to a full roll, which effectively reduces the chances of a quadbike pinning a rider.  The momentum of the roll was also slowed and a space between the quadbike and the ground was maintained.

Why should I fit a Quadbar?


latest News

AACC to make ATV roll bars mandatory
The debate on roll over protection for quad bikes has taken another turn with a major agricultural institution making them mandatory
Department of Labour
Quad bikes are involved in approximately 28% of all work-related farm deaths.

Quad bikes: Risky business
Quad bike accidents have claimed 45 lives and caused more than 17,000 injuries in the last decade, among farm workers and recreational users. Amanda Cropp reports on the increasingly heated debate over how to improve our safety record. (click the header above to read the full article)

Technical Information

Fitting Instructions (PDF)
Always be aware of the height of the Quadbar to avoid obstacles (as you would with the width of the quadbike)...
An assessment of passive roll over protection for Quad Bikes
from University of Southern Queensland Faculty of Engineering and Surveying
Ridge Report
In this research report Ridge Solutions looks at the engineering strength and energy absorption characteristics of the Quadbar