235/50/18 possible?
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10th Gear
Joined: Mar 2025
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235/50/18 possible?
Currently have the 2022 ES300h with the noise reduction wheels. Running on 235/45/18. Is 235/50/18 possible? Would that cause issues? What if i only put the larger sidewall wheels on the rears?
Last edited by JOCAM; May 29, 2026 at 10:01 PM.
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Joined: Mar 2019
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From: Alberta
Try this site for info on potential interference, diameter difference, etc. If you are already running on 235/45/18, why are you asking if it's possible to use 235/45/18?
https://www.wheel-size.com/calc/?whe...cl=50mm&sr=0mm
https://www.wheel-size.com/calc/?whe...cl=50mm&sr=0mm
Last edited by Tootsall; May 29, 2026 at 01:52 PM.
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From: Florida
235/45R18 diameter = 26.33 inches
235/50R18 diameter = 27.25 inches a 3.5% greater diameter which will effect various settings
Found this online AI response
Your decision research further
Using 235/50R18 on a 2022 Lexus ES300h with 235/45R18
For your 2022 Lexus ES300h, the OEM 18-inch setup is 235/45R18 on 18×8 ET45 wheels TireWheelGuide.com. The 235/50R18 is a slightly taller profile tire, but it’s still within the same width (235 mm) and wheel diameter (18") as the OEM.Fitment compatibility:
- Width: Same (235 mm) — no interference with wheel fitment.
- Diameter: Same (18") — no change in ride height or clearance.
- Aspect ratio: 50 vs. 45 means the 235/50R18 is taller, which can give a slightly softer ride and marginally better grip, but may reduce high-speed stability compared to the OEM TireWheelGuide.com.
- Load/Speed ratings: You should match or exceed the OEM load index (94V) and speed rating (Y) for safety and warranty compliance TireWheelGuide.com+1.
- Check your wheel offset (ET45) — the 235/50R18 must fit the same ET45 18×8 wheels. If you’re using different rims, confirm offset and backspacing to avoid rubbing.
- Ride height & clearance: The taller profile may slightly raise the ride height, but for most ES300h models, this is minimal and safe.
- Load/Speed ratings: If your OEM tires are 98Y, you can use 94V or higher, but avoid dropping below 94V unless you increase tire pressure to compensate Lexus Owners Club.
- Warranty & performance: Using a different size without Lexus approval may void certain warranty provisions.
- Aesthetics & handling: The 235/50R18 will look similar but may feel slightly different in handling and ride comfort.
Yes — 235/50R18 is a safe and common alternative to 235/45R18 on your 2022 ES300h, provided you use the same 18×8 ET45 wheels and maintain or exceed the OEM load/speed ratings. It’s a popular choice for a softer ride and slightly better grip, but you should confirm fitment with your wheels before installation.
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235/50R18, 27.3"outer diameter, has been posted on this forum in the past.
Max I have seen reported is 27.7" (245/45R19 and 245/40R20)
Original is 94V at 35 psi.
300h cannot go past 115 mph, you absolutely don't need to go up to V (149 mph)
235/50R18 standard load index is 97, so your load capacity maintaining pressure would be between 31 and 32 psi.
Max I have seen reported is 27.7" (245/45R19 and 245/40R20)
Original is 94V at 35 psi.
300h cannot go past 115 mph, you absolutely don't need to go up to V (149 mph)
235/50R18 standard load index is 97, so your load capacity maintaining pressure would be between 31 and 32 psi.
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