2018 Lexus LC — 500
The 2018 Lexus LC 500 shipped with 4 different factory tire sizes, depending on the wheel package it left the factory with (this can also reflect a staggered front/rear setup). Check your tire sidewall or door placard to confirm which one applies to your vehicle.
This trim shipped with more than one tire size (staggered fitment, front/rear, or optional wheel package). Confirm which one matches your vehicle by checking your tire sidewall or door placard.
245/45R20 (Front)
| Section width | 245 mm |
|---|---|
| Aspect ratio (sidewall height) | 45% (110.3 mm) |
| Rim diameter | 20" |
| Overall tire diameter | ~28.7" |
| Revolutions per mile | ~703 |
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275/40R20 (Rear)
| Section width | 275 mm |
|---|---|
| Aspect ratio (sidewall height) | 40% (110 mm) |
| Rim diameter | 20" |
| Overall tire diameter | ~28.7" |
| Revolutions per mile | ~704 |
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245/40R21 (Front)
| Section width | 245 mm |
|---|---|
| Aspect ratio (sidewall height) | 40% (98 mm) |
| Rim diameter | 21" |
| Overall tire diameter | ~28.7" |
| Revolutions per mile | ~702 |
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275/35R21 (Rear)
| Section width | 275 mm |
|---|---|
| Aspect ratio (sidewall height) | 35% (96.3 mm) |
| Rim diameter | 21" |
| Overall tire diameter | ~28.6" |
| Revolutions per mile | ~706 |
Compare prices at:
What this size means for your Lexus LC
On the 2018 Lexus LC 500, the factory 245/45R20 measures about 28.7″ in overall diameter with a 110.3 mm (4.3″) sidewall, and completes roughly 703 revolutions per mile. Its 45-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 large-diameter fitment.
This is a staggered setup: the front axle runs 245/45R20 and the rear runs 275/40R20. The two sizes are not interchangeable, so order each for its correct axle and don't rotate front-to-rear.
Other 2018 Lexus LC trims
- 500h 245/45R20 (Front) / 275/40R20 (Rear)
Lexus LC tire sizes by year
- 2026 Lexus LC 245/40R21 (Front) / 275/35R21 (Rear)
- 2025 Lexus LC 245/40R21 (Front) / 275/35R21 (Rear)
- 2024 Lexus LC 245/45R20 (Front) / 275/40R20 (Rear) / 245/40R21 (Front) / 275/35R21 (Rear)
- 2023 Lexus LC 245/45R20 (Front) / 275/40R20 (Rear) / 245/40R21 (Front) / 275/35R21 (Rear)
- 2022 Lexus LC 245/45R20 (Front) / 275/40R20 (Rear) / 245/40R21 (Front) / 275/35R21 (Rear)
- 2021 Lexus LC 245/45R20 (Front) / 275/40R20 (Rear) / 245/40R21 (Front) / 275/35R21 (Rear)
- 2020 Lexus LC 245/45R20 (Front) / 275/40R20 (Rear) / 245/40R21 (Front) / 275/35R21 (Rear)
- 2019 Lexus LC 245/45R20 (Front) / 275/40R20 (Rear) / 245/40R21 (Front) / 275/35R21 (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.