Ertiga Tyre Size for Every Variant

Variant chart: Ertiga tyre size for LXi through ZXi+ and CNG

The Ertiga VXi tyre size and the Ertiga VXi CNG tyre size are both 185/65 R15. On CNG cars the gas tank rides in the luggage area, loading the back axle harder, yet the maker kept the tyre unchanged. What changes is how often you should check the rear pressure.

Rim and overall size of the Ertiga tyre in inches

Every Ertiga sits on a 15 inch rim. LXi and VXi roll on pressed steel under plastic trims; ZXi and ZXi+ use alloys of that same diameter. If you want the tyre size in inches, the whole tyre stands roughly 24.5 inches tall: the sidewall is 65 percent of 185 mm, about 120 mm, counted twice, plus the 381 mm rim, which gives about 621 mm.

The tread is 185 mm wide, a little over 7 inches. That narrow width keeps steering light in city traffic and helps fuel economy on a heavy seven seater, at the cost of some grip when you brake hard with all three rows full.

Reading 185/65 R15 on the sidewall

• 185: tread width in millimetres.
• 65: sidewall height, expressed as a percentage of tread width. A tall sidewall like this soaks up speed breakers and broken patches.
• R: radial construction.
• 15: rim diameter in inches.

Following the size you will find a two digit load index and a letter for speed. Copy or exceed whatever your factory tyres carry when you replace them, because a loaded Ertiga with all seats taken and bags aboard weighs far more than a hatchback on the same 15 inch rim. Our guide on how to read tyre size explains every marking.

Can you fit a bigger tyre on the Ertiga

Many owners ask for a wider look. The rule we follow at the shop: a replacement should land within 3 percent of the stock 621 mm figure.

The maker offers none of these sizes on this MPV, so treat them as your own choice. Wider tyres add steering effort, can rub the inner arch on ghat road hairpins with seven aboard, and may affect warranty and insurance claims. A 16 inch wheel also has a thinner sidewall, which hurts more on potholes. Run any size through our tyre size calculator first.

New Ertiga tyre size vs the previous generation

The new Ertiga tyre size is unchanged from the first generation. Both use 185/65 R15, so a tyre bought for an older LXi or ZXi also fits the current car. The first generation also had steel wheels on lower variants and alloys on the top variants. What differs is the wheel design, so an alloy from one generation will not always look right on the other even if it bolts on.

Spare tyre and wheel on the Ertiga

The Ertiga carries a steel spare wheel. Read its sidewall once: if it says 185/65 R15, the spare matches the road tyres and you can drive on it normally until the flat gets repaired. A spare can sit untouched for months and quietly go soft, so gauge it monthly whenever you do the other four. Look at its date code too, because a spare that never touches the road still ages. See our spare tyre guide for rotation tips.

When to replace Ertiga tyres

Swap the set once the grooves wear level with the 1.6 mm bars moulded across them; do it sooner if your routine includes rainy expressway runs. On an Ertiga the front tyres wear faster, because they steer and carry the engine. Rotate front to rear about every 10,000 km so all four wear evenly.

Old rubber hardens and cracks even with good tread. Read the four digit code on the sidewall using the tyre manufacturing date page. Book a wheel alignment whenever a fresh set goes on.

More Ertiga wheel and tyre pages

For air pressure by load, see Ertiga tyre pressure. For wheel designs and aftermarket choices, see Ertiga alloy wheels, and for covers on steel wheels see Ertiga wheel cap. Side by side figures for other models sit in the car tyre size hub, including the Brezza tyre size page for a quick comparison.