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Factory tyre sizes

BMW Z4 tyre sizes and what a set of four costs

The BMW Z4 G29 (2019 on) came from the factory on 225/45 R18, 255/35 R19 tyres; across the wheel options listed, wheels range from 18in to 19in. A fitted set of four costs about £574–£664 with mid-range tyres and £746–£839 with premium tyres (73 Auto estimate from UK retailer prices observed on 23 September 2026, 2 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
2
1 generation group, MEDIUM confidence
Cheapest set of four
£574
mid-range tyres, fitted (73 Auto estimate)
Dearest set of four
£839
premium tyres, fitted (73 Auto estimate)

BMW Z4 G29 (2019 on) tyre sizes

Factory tyre sizes and fitted set-of-four cost, BMW Z4 G29
Wheels / trimsFrontRearMid-range setPremium set
18in225/45 R18 95Y XL255/40 R18 99Y XL£574£746
19in255/35 R19 96Y XL275/35 R19 100Y XL£664£839
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 Z4 tyres

The cheapest BMW Z4 fitment to re-tyre is 225/45 R18 95Y XL (G29) at about £574 for a mid-range fitted set; the dearest is 255/35 R19 96Y XL with 275/35 R19 100Y XL rears (G29) at about £664 — 1.2 times as much.

That is 1 inch of rim, about £91 more per set for each extra inch.

2 of the 2 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 £664 to £839.

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.

BMW Z4 tyres at the MOT

In 70,690 DVSA MOT tests of the BMW Z4 from 1 January 2023 to 30 December 2024, 5.9% failed on at least one tyre item (all cars: 6.4%); adjusted for age, mileage and fuel that is about the same as comparable cars. See the BMW Z4 MOT pass rate.

Official data: DVSA anonymised MOT tests, Open Government Licence v3.0.

Prices for BMW Z4 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 Z4: tyres, MOT and running costs

Enter a BMW Z4 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.