The Lexus IS is one of the most consistent platforms in this series. Across seventeen years and two full generations, the bolt pattern, hub bore and thread never changed: 5×114.3, 60.1 mm, M12x1.5. The front offset never left ET45 either.
What does change — and what catches people out — is the rear. On the 17-inch cars there is no stagger at all. On the 18-inch cars and on the IS F, the rear rim gets wider and the offset goes up.
Section 1: OEM Wheel Specifications by Generation
| Generation / Model | Years | Bolt Pattern | Hub Bore | Thread | Front Wheel | Rear Wheel |
|---|---|---|---|---|---|---|
| XE20 IS250 / IS300 / IS350 (17") | 2005-2013 | 5×114.3 | 60.1 mm | M12x1.5 | 8Jx17 ET45 | 8Jx17 ET45 |
| XE20 IS250 (16") | 2005-2013 | 5×114.3 | 60.1 mm | M12x1.5 | 7Jx16 ET50 | 7Jx16 ET50 |
| IS F | 2008-2014 | 5×114.3 | 60.1 mm | M12x1.5 | 8Jx19 ET45 | 9Jx19 ET55 |
| XE30 (17") | 2013-2022 | 5×114.3 | 60.1 mm | M12x1.5 | 7.5Jx17 ET45 | 7.5Jx17 ET45 |
| XE30 (18") | 2013-2022 | 5×114.3 | 60.1 mm | M12x1.5 | 8Jx18 ET45 | 8.5Jx18 ET50 |
| XE30 IS300h (16") | 2013-2022 | 5×114.3 | 60.1 mm | M12x1.5 | 7Jx16 ET45 | 7Jx16 ET45 |
Note that the XE20 17-inch cars run a staggered tyre (225/45R17 front, 245/45R17 rear) on an identical 8Jx17 ET45 rim at both ends.
Section 2: Offset Comparison & Fender Clearance Visualization
Section 3: The Staggered Tyre, Square Wheel Trick
This is the detail most XE20 owners never notice. An IS250 or IS350 on the 17-inch package has four identical wheels — 8Jx17 ET45 — but different tyres front and rear: 225/45R17 at the front and 245/45R17 at the rear.
Two consequences:
- The wheels rotate freely, which is unusual on a rear-drive performance saloon and a genuine ownership advantage.
- A 245-section tyre on an 8-inch rim is at the wide end of its range. If you replace the rears with a 235, the car will not mind; if you try to run 255 on the factory rim, you are outside the tyre manufacturer’s recommended rim width.
A Japanese-market IS on forged RAYS wheels — the 60.1 mm Toyota bore and 5×114.3 pattern give access to almost the whole Japanese catalogue. — via @@t.tomo_32_7
Section 4: The IS F and Its ET55 Rear
The IS F is the outlier, and its 9Jx19 ET55 rear is worth dwelling on. Ten millimetres higher than the front, on a rim an inch wider — the wheel gets bigger and moves further inboard at the same time.
That puts the IS F firmly in the “rear-in” camp alongside the Honda S2000, the Chaser JZX100 and the Mercedes-AMG range.
Which makes the GS F genuinely surprising: it runs ET50 front and ET41 rear — the rear pushed out. Two F-badged Lexus saloons, built within a few years of each other, with opposite answers. It is the clearest evidence in this whole series that stagger philosophy is a chassis decision, not a brand signature.
Section 5: Popular Aftermarket Sizes
- 18×8.5 ET35 front / 18×9.5 ET35 rear — the standard IS upgrade. Roughly 10 mm more poke per side than factory. Fits standard arches at stock height.
- 19×8.5 ET30 / 19×9.5 ET30 — the modern proportion. Fender roll on lowered cars.
- 19×9 ET22 / 19×10 ET22 — aggressive street fitment. Roll and camber expected.
- 18×8 ET45 — a straight factory-equivalent replacement if you simply want a different design.
The IS has a relatively tight front arch. ET30 at 9 inches wide is roughly where the front wheel starts to reach the liner on a lowered car — the rear will take considerably more.
Section 6: The 60.1 mm Toyota Bore
The IS shares Toyota’s standard bore with the Supra, MR2, Celica, Chaser and every Lexus up to the LS430.
- Supra, Chaser and MR2 wheels fit — see our Supra guide.
- Nissan wheels (66.1 mm) fit with hub rings. The bore is larger than the hub, so a 66.1–60.1 ring is all that is required.
- Evo and RX-7 FD wheels (67.1 mm) fit with rings.
- The LS460 does NOT share this fitment — it moved to 5×120 with M14x1.5 studs. See our LS460 guide.
Related Fitment Guides
- Lexus GS350 / GS F — the F cars disagree on stagger
- Lexus SC / Toyota Soarer — the same Toyota fitment
- Toyota Chaser JZX100 — the saloon that preceded it
- Toyota Sienna — the same bolt pattern on a very different vehicle
Every guide in this series is built the same way: verified factory specifications, an offset diagram, and an honest account of what fits and what does not.
Buying Wheels for Your IS
The IS is a forgiving platform: one bolt pattern, one bore, one thread, and a front offset that never moves. The only question worth asking twice is whether your car has a staggered rear — and on most IS models, it does not.
Looking for a specific set? We specialise in genuine Japanese wheels — RAYS, Volk, Enkei, SSR, WORK, BBS Japan and the rare discontinued sets that never left the country. Tell us the wheel, the fitment, the year — our team searches our networks until we find it.
Specifications in this guide reflect factory equipment for Japanese-market vehicles. Trim levels, optional wheel packages and market-specific variants can differ. Always confirm the fitment against your own car before purchase.