2024 Lexus IS — 350
The 2024 Lexus IS 350 came from the factory equipped with 235/40R19 tires. If your vehicle has since been fitted with aftermarket or upsized wheels, your actual tire size may no longer match this factory spec — always confirm against your door placard before buying.
235/40R19
| Section width | 235 mm |
|---|---|
| Aspect ratio (sidewall height) | 40% (94 mm) |
| Rim diameter | 19" |
| Overall tire diameter | ~26.4" |
| Revolutions per mile | ~764 |
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What this size means for your Lexus IS
On the 2024 Lexus IS 350, the factory 235/40R19 measures about 26.4″ in overall diameter with a 94 mm (3.7″) sidewall, and completes roughly 764 revolutions per mile. Its 40-series aspect ratio gives a low-profile sidewall tuned for sharper handling, common on sport trims and larger-wheel packages. In tire terms it is a passenger (P-metric / Euro-metric) size.
Other 2024 Lexus IS trims
- 300 235/45R18 / 235/40R19
- 300 AWD 235/45R18 / 235/40R19
- 300 F Sport 235/40R19 (Front) / 265/35R19 (Rear)
- 350 AWD 235/40R19
- 350 F Sport 235/40R19 (Front) / 265/35R19 (Rear)
- 500 F Sport 235/40R19 (Front) / 265/35R19 (Rear)
Lexus IS tire sizes by year
- 2026 Lexus IS 235/40R19 (Front) / 265/35R19 (Rear)
- 2025 Lexus IS 235/45R18 / 235/40R19
- 2023 Lexus IS 235/45R18 / 235/40R19
- 2022 Lexus IS 235/45R18
- 2021 Lexus IS 235/45R18
- 2020 Lexus IS 225/45R17 / 225/40R18 (Front) / 255/35R18 (Rear)
- 2019 Lexus IS 225/45R17 / 225/40R18 (Front) / 255/35R18 (Rear)
- 2018 Lexus IS 225/45R17 / 225/40R18 (Front) / 255/35R18 (Rear)
- 2017 Lexus IS 225/40R18 (Front) / 255/35R18 (Rear)
- 2016 Lexus IS 225/45R17 / 225/40R18 (Front) / 255/35R18 (Rear)
How to read a tire size
A tire size like 225/45R17 breaks down into three parts:
the first number is the section width in millimeters
(the tire's width from sidewall to sidewall), the second is the
aspect ratio — the sidewall's height as a percentage of
that width — and the number after the "R" is the rim
diameter in inches. A letter prefix (P or LT) indicates
Passenger or Light Truck construction; its absence usually means
Euro-metric sizing.
Some trucks and off-road tires instead use "flotation" sizing, like
37X12.50R17 — here the numbers are the tire's overall
diameter and width in inches directly, with the rim diameter last.
Always verify against the tire information placard on your driver's-side door jamb or your owner's manual before purchasing — tire size can vary by factory option package even within the same trim.