Choose Car Type

Search for parts
for parts

ROB ROAD TR4-6 No DIAG No Harness Bar

RTR Upgrade
Kit No:
Price Ex VAT @ 20%

AVAILABLE This part is available to order


TR4-6 Roll Over Bar (ROB) road type for soft top and hard top cars of simple design with no diagonal brace or harness bar. RevingtonTR's road bars are designed for those who desire the extra safety of a ROB but do not require a diagonal brace. A harness bar RTR9148HB or RTR9148HB-1 can be bought separately. See below

RevingtonTR's road bars are designed for the casual road user who wishes to increase the safety of their TR but doesn't necessarily wish to use their vehicle for competition. To make the bar less of an obstruction, more convenient and to reduce the cost of the bar, road bars do not have a diagonal brace but do have 2 angled back stays. The bars are made from the same high quality steel as the competition bars and therefore give that extra piece of mind in case of that unfortunate occurrence of an accident.

Note for TR4A Owners: Whilst this ROB is appropriate for all TR4 through to TR6 the hood catches on TR4A cars come close to the ROB backstays and may impede the fitting of a hood stowage cover. 

This TR4-6 ROB sits entirely on the rear flat horizontal floor above the differential (sometimes called the parcel shelf). The ROB fits under the hood frame, allowing it to be raised and lowered, and fits under a hard top. There are 4 fixing positions and each position has provision for 2 M10 mounting screws. These are secured with Nyloc nuts below the floor through a spreader plate positioned below the floor. This method of fixing is adequate for all applications where the ROB is employed. Should further security be required with mountings onto the chassis, then a full cage should be used. 

RevingtonTR Roll Over Protection (ROP) - The range 

RevingtonTR supply a full range of ROP including Roll Over Bars (ROB) and Full Roll Cages for the complete TR range. All ROB's allow the hood to be folded and unfolded and a hard top to be fitted unless specified otherwise. The following descriptions are used to describe the style of bars in our range.

ROAD BARS have no diagonal brace and have the option, to special order only of an integral, transverse harness bar. (RTR9053-1HB).

COMPETITION BARS are supplied with fixed (RTR9053-2 series) or removable (RTR9053-3 series) diagonal brace, and have the option to special order only of a transverse harness bar.

Our preferred option for all our TTR4-6 ROB's is to supply a ROB with no harness bar and one of our stand alone harness bars as this provides far more flexibility and additional space in the cockpit. 
Please see below for other ROBs available for your car.

For Hard Top cars TR4-5, please also see  RTR9148 Series of ROB's intended primarily for fibreglass backlight frame applications, effective with many other hart top arrangements.
Our range of ROP's is extensive, to help you decide what is best for you we have compiled an information sheet in an easy to follow tablature format. Please see IS0040 here or via the 'Further Reading' tab above. 


Will this ROB give me adequate protection?

Neil Revington provides some insight: - 

All ROB's in the RTR9053 series are attached to the rear floor and wheel arch bases as can be seen in the photographs. Whist there are bars available for soft top TR4-6 with a main hoop that attaches to the chassis, they impede seat and hood sticks movement in many cases.

All main mountings of our full cages are attached to the chassis. Yes, attaching all mountings to the chassis would be fundamentally better but by how much? What is most important is the data relating to accidents. Fitting any one of the ROP's in our range is a good idea, choosing the right one is a matter of personal choice of how much 'cotton wool' to wrap yourself in.

The results of the actual events highlighted below show that body mounted ROB's provide adequate protection; full cages are available for those that feel a cage is the solution for them.

The original concept of this  type of design can be attributed to John Aley of Aley bars in the 1970's. A very early bar was fitted to John Welburn's black TR2 which he then rolled at Goodwood. There are photos of John, arms flaying as he rolled over and over. John walked away with no injuries. The bar was intact, the wheel arches dented but the bar nonetheless saved John life. A few year later Frank Richardson had a similar unfortunate roll in qualifying for a TR Register race. In this case, Frank was also thankfully OK, the wheel arches were not damaged and the car, after a few dents were knocked out, raced the next day.

Please Note: The various photographs available to view here show bars with and without harness bars and a diagonal brace for reference. The basic concept of the main hoop and backstays remains the same throughout the range.



We do not provide fitting instructions with this ROP as in general it will fit in one ideal place. We do however offer a sheet of fitting tips, which can be downloaded via the 'Further Reading' tab above.

Accessories, Tools, Services and Safety Equipment

To view the Triumph Catalogue Plates, please pick a car type