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Factory tyre sizes

BMW i4 tyre sizes and what a set of four costs

The BMW i4 G26 BEV (2021 on) came from the factory on 245/45 R18, 245/40 R19, 245/35 R20 tyres; across the wheel options listed, wheels range from 18in to 20in. A fitted set of four costs about £540–£654 with mid-range tyres and £665–£862 with premium tyres (73 Auto estimate from UK retailer prices observed on 23 September 2026, 3 factory fitments).

Check what a specific car really costs to own

Data to 2026-09-23 · Page updated 2026-09-28 · Publisher: 73 Auto

Factory fitments
3
1 generation group, MEDIUM confidence
Cheapest set of four
£540
mid-range tyres, fitted (73 Auto estimate)
Dearest set of four
£862
premium tyres, fitted (73 Auto estimate)

BMW i4 G26 BEV (2021 on) tyre sizes

Factory tyre sizes and fitted set-of-four cost, BMW i4 G26 BEV
Wheels / trimsFrontRearMid-range setPremium set
18in · electric245/45 R18 100Y XLSame as front£540£665
19in · electric245/40 R19 98Y XL255/40 R19 100Y XL£624£764
20in — M50 · electric245/35 R20 95Y XL255/35 R20 97Y XL£654£862
Set of four = two front and two rear tyres at the median price for that exact size, load index and speed rating, plus fitting, balancing, valves and disposal. — means too few market offers to price it.

How wheel size changes the cost of BMW i4 tyres

The cheapest BMW i4 fitment to re-tyre is 245/45 R18 100Y XL (G26 BEV) at about £540 for a mid-range fitted set; the dearest is 245/35 R20 95Y XL with 255/35 R20 97Y XL rears (G26 BEV) at about £654 — 1.2 times as much.

That is 2 inches of rim, about £57 more per set for each extra inch.

2 of the 3 fitments are staggered (different front and rear sizes). Staggered tyres cannot be rotated between axles, so the driven axle usually wears out first and pairs are replaced separately.

Choosing premium over mid-range brands moves the most expensive set from £654 to £862.

How often you pay depends on wear as well as price: car tyre cost explains how 73 Auto turns these prices into a yearly figure for a specific car.

Prices for BMW i4 tyre sizes

Other BMW models

Where the sizes come from

  • 73 Auto editorial compilation of published OE fitments (manufacturer brochures, placards and tyre-maker OE catalogues) — 73 Auto (medium confidence)

Limitations

Factory sizes are from 73 Auto's fitment reference; rows from the editorial compilation are medium confidence and not individually verified against a manufacturer document. A car may have been fitted with other wheels since new: check the size on the tyre itself.

Prices observed on public UK retailer listings (Camskill and Tyreleader) on 23 September 2026, aggregated by 73 Auto. Set-of-four prices are 73 Auto estimates for the exact tyre specification, not quotes; retail prices change often.

Check a specific BMW i4: tyres, MOT and running costs

Enter a BMW i4 registration to see which tyres that car is likely to have, what replacing them costs at your mileage, and its MOT history. Your first check is free and shows the vehicle summary and its headline ownership cost. The category-by-category breakdown is part of a paid check.

UK number plate or 17-character VIN

Where these figures come from

Figures labelled as 73 Auto estimates are our own analysis of these sources, set out in the methodology and data sources. To report a factual error, see corrections.