SIZE COMPARISON
255/45 R20
From £115.38 per tyre
334 current variants · 27 brands
Item-price range £115.38–£445.20. Fitting extra; delivery conditions vary.
Browse 255/45 R20 →Manufacturer size reference
BMW iX3
tyres & wheels.
UK online tyre reference; checked 30 September 2026
Selected entries from the named UK BMW tyre-label table. Model years and trim assignments are not stated. The body style and standard/run-flat construction shown in each row are part of the reference; front and rear entries must not be interchanged. This is not an approved wheel conversion list.
Check your exact vehicle. These are selected documented combinations, not a registration lookup or a complete fitment list. A tyre with the same size can have a different load index, speed rating, construction or manufacturer approval.
THE MANUFACTURER DETAILS
Which wheels and tyre sizes are listed?
UK online tyre reference; checked 30 September 2026 · United Kingdom
| Version / wheel option | Tyre specification | Wheel dimensions | Axle coverage |
|---|---|---|---|
| iX3; standard (STD) | 255/45 R20 105 W XL | 20 inch diameter; rim width not listed | Front and rear |
| iX3; standard (STD) | 255/40 R21 102 W XL | 21 inch diameter; rim width not listed | Front and rear |
| iX3; standard (STD) | 255/40 R21 102 Y XL | 21 inch diameter; rim width not listed | Front |
| iX3; standard (STD) | 275/40 R21 107 Y XL | 21 inch diameter; rim width not listed | Rear |
Ratings appear only where recorded in this selection. An omitted rating or axle assignment means it has not been established here. Wheel width and offset are shown where supported; diameter alone does not specify a replacement wheel.
YOUR NEXT STEP
Compare tyres in these sizes
These catalogue summaries group tyres by size only. They do not check compatibility with your iX3. Confirm all vehicle requirements before choosing a tyre.
SIZE COMPARISON
255/40 R21
From £156.20 per tyre
161 current variants · 22 brands
Item-price range £156.20–£646.08. Fitting extra; delivery conditions vary.
Browse 255/40 R21 →SIZE COMPARISON
275/40 R21
From £142.29 per tyre
89 current variants · 19 brands
Item-price range £142.29–£411.21. Fitting extra; delivery conditions vary.
Browse 275/40 R21 →Source feed date: 2026-09-29. Two UK retailers in one group; this is not the whole market. Price history and retailer links appear on individual tyre pages. We may earn commission from those links.
Before buying for your iX3
- Match the vehicle’s year, generation, engine and trim to this edition.
- Check the fitted wheel option and the approved specification for each axle.
- Confirm load and speed ratings, XL and HL, run-flat construction and any manufacturer markings.
- Compare the exact tyre variant and ask your manufacturer or fitter if anything differs.
Source & coverage
BMW manufacturer reference ↗
UK online tyre reference; checked 30 September 2026
United Kingdom. This guide applies to the selected edition and rows above. Later revisions and other wheel packages may differ.
Source checked and facts reviewed 30 September 2026. Manufacturer documents may be revised. Our data method.