Defender Wheel Offset Explained: Why Your 265s Rub and What Actually Fixes It

The same question has been circulating on Defender forums for fifteen years. Someone fits 265/75R16 tyres, and the wheels rub on the radius arms at full lock and scrub the top of the rear spring turrets under articulation. The answers usually stop at "you want zero offset." That is roughly correct, and it explains nothing.

Here is the whole picture.

Offset is not backspacing

Two different measurements describe the same problem, and people mix them constantly.

Offset (ET) is the distance in millimetres between the wheel's mounting face and its centreline. Positive offset means the mounting face sits outboard of the centreline, pulling the wheel inward toward the suspension. Negative offset pushes the wheel outward.

Backspacing is the distance in inches from the mounting face to the inner lip of the rim.

The two are related but not interchangeable, because backspacing depends on rim width and offset does not. A 16x8 wheel at ET0 has 5 inches of backspacing. A 16x10 wheel at ET0 has 6 inches. Same offset, very different clearance to your suspension.

When someone on a forum says "stay around 3.5 inches of backspace," they are giving advice that only holds for the rim width they happen to be running. Offset is the more portable number.

What the factory gave you

Standard Defender boost alloys are +33 offset. That is a road-biased figure. It tucks the wheel well inside the arch, keeps the track narrow, and works fine with the 235-section tyres the vehicle was designed around.

The problem starts when you fit a wider tyre to that same wheel. A 265-section tyre is 30mm wider than a 235. Roughly 15mm of that goes to each side. At +33 offset, the extra inner 15mm has nowhere to go, and it finds the radius arm at full steering lock.

The working range

For a Defender running 265/75R16 or 285/75R16:

ET+10 to ET-10 is the practical window.

At the positive end of that range the tyre sits close to flush with a standard flare. At the negative end you gain track width and clear the suspension comfortably, but the tyre starts sitting proud of the flare, which creates its own problems: spray, stone throw, and in Australia a roadworthy issue if the tread sits outside the bodywork.

Beyond -10 you are into territory that needs wider flares to stay legal and to stop the tyre flinging debris down the side of the vehicle.

ROHMY forged wheels for the Defender sit at ET10 on 18x8.5 with 5x165.1 PCD. That is deliberately at the conservative end of the window — enough track gain to clear the radius arms, not so much that you need flare extensions to keep it road legal.

Where the rubbing actually happens

Three contact points, in order of how often they come up:

Radius arms, at full lock. The inner shoulder of the tyre contacts the front radius arm when the steering is at its limit. This is a static clearance problem, fixed by offset or by winding out the steering stops. Winding out the stops works, but it reduces your turning circle, which on a vehicle already known for a poor turning circle is a real cost.

Rear spring upper mounts, under articulation. The tyre contacts the top of the rear coil turret only when the axle is at or near full droop or full stuff. Most owners report this wears paint and nothing else. It is a low-range, low-speed condition. It is annoying rather than dangerous, but over time it will wear the inner shoulder of the tyre.

Front spring turrets, under articulation. Same mechanism as the rear, less common.

Rim width matters as much as offset

A 265/75R16 tyre needs a minimum rim width of 7 inches, and it is happier on 8. Fitting a 265 to a 6.5-inch Wolf rim technically works but pinches the tyre profile, which changes the sidewall shape and can make the rubbing worse rather than better.

If you are buying wheels to solve a rubbing problem, buying the correct width is half the fix.

On spacers

Spacers are the common workaround: take a Discovery rim at +33 and add a 30mm spacer to arrive at roughly zero offset. Mechanically this works, and plenty of people run it for years without a bearing failure.

Two things to weigh. First, a spacer moves the wheel outboard without changing the wheel's own structure, so the load path through the wheel bearing changes in the same way a negative offset wheel would — the concern people raise about bearing wear applies equally to both. Second, in several Australian states spacers sit in a grey area for roadworthy compliance depending on thickness and how they are mounted.

A correctly offset wheel is the cleaner answer. A spacer is the cheaper one.

Load rating, which nobody asks about

Offset gets all the attention. Load rating gets none, and it matters more if you tour loaded.

A Defender 110 at GVM with a full long-range tank, water, and a roof rack puts real load through four wheels. ROHMY forged Defender wheels are rated at 1200kg per wheel. Cheaper aftermarket alloys are frequently rated well below that and the figure is not always published.

If the load rating is not on the product page, ask for it before you buy.

The short version

• Factory boost alloys are +33. That is why your 265s rub.
• Target ET+10 to ET-10 for 265 or 285 tyres on a standard-flare Defender.
• Beyond -10 you need wider flares to stay legal and stop stone throw.
• Run at least a 7-inch rim for a 265, ideally 8.
• Offset and backspacing are different numbers. Compare offset.
• Check the load rating before you check the finish.

Before you buy

Wheel and tyre combinations outside the factory specification may affect your vehicle's compliance. Fitment outside standard flare coverage is off-road use only. Confirm your state's roadworthy requirements before fitting. Professional installation required. Load ratings quoted are per wheel — confirm against your loaded GVM.

ROHMY Australia builds forged 6061T wheels for the Land Rover Defender 1990–2016 and Classic Range Rover 1975–1993, in 18x8.5 ET10, 5x165.1 PCD, rated to 1200kg. Richmond, Melbourne.