Ford Focus ST Tire Size
Factory tire size for the Ford Focus ST.
Last updated: 2026-11-01 • Reading time: 8 min • By AllOEMManuals Editorial Team
Quick Answer
2016-2018 Ford Focus ST: 235/40R18 95Y XL.
| Generation | Years | Top spec |
|---|---|---|
| 2016-2018 | 2016-2018 | 235/40R18 95Y XL |
| 2015 | 2015 | 235/40R18 95Y XL |
This vehicle's factory manual
Ford Focus ST: choose your year, then confirm the engine, trim, or drivetrain to open the available repair and diagnosis sections.
Ford Focus ST maintenance schedule
Know the exact tire size job for your Ford Focus ST
2016-2018 Ford Focus ST: 235/40R18 95Y XL.
Wheel and tire sizes change by trim, package, and wheel diameter. Use the door-jamb placard as the final authority. Once the spec is confirmed, use the supplies and purchase links below to build the full one-trip shopping list before you start the repair.
Exact Vehicle Check
The button opens the factory book for this vehicle. Use the engine picker only when your trim is not the one this page already matched.
2016-2018
2015
Parts and supplies
These links search for related products. Check your year, engine, specification, and fitment with the seller before ordering.
Ford Focus ST Tires — 235/40R18
Confirm the specification and fitment for your exact vehicle before ordering.
We earn a small commission if you buy through these links — at zero extra cost to you. These are search results, not verified vehicle-specific recommendations.
Tires — Manual's Parts List
Exact size, exact pressure, ready to roll.
- 1TiresShop →
235/40R18 — match speed rating and load index from door sticker
- 2TPMS Valve Stem KitShop →
Replace rubber valves when mounting new tires
- 3Digital Tire Pressure GaugeShop →
Gas station gauges are usually 5+ PSI off
- 4Portable Air CompressorShop →
Inflate at home instead of driving to the gas station
Get everything at once
Search results vary; confirm each item and its fitment before buying.
Links go to Amazon via our affiliate store (aiautorepair-20). We earn a small commission at no extra cost to you — it keeps the site running and the data free.
One-Trip Shopping List
Recommended supplies and tools for this job, grouped so you can buy everything before the repair starts.
Tire Pressure Gauge
Digital or analog gauge for precise pressure checks.
Portable Air Compressor
Inflate your tires anywhere, anytime.
Tire Tread Depth Tool
Check if your tires are safe and ready for the road.
Valve Stem Caps
Keep dirt and moisture out of your tire valves.
Tire Repair Kit
Useful emergency backup for puncture-prone drivers.
Project Essentials
Basic tool sets, gloves, and cleaning supplies for your Ford Focus ST so the job is ready when the parts arrive.
Frequently Asked Questions
- What tire size does a Ford Focus ST use?
- 2016-2018 Ford Focus ST: 235/40R18 95Y XL.
- What tire pressure for a Ford Focus ST?
- 36 - 36 (2016-2018)
- Can I use a different tire size on my Ford Focus ST?
- Deviating from the factory tire size changes speedometer accuracy, handling, and load capacity. If you change sizes, ensure the overall diameter stays within 3% of OEM and the load/speed ratings meet or exceed factory specs.
Find your service manual
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Author & Review
Published by AllOEMManuals, founded by Lyndon Bedford, an automotive technician with 20 years of experience. He owned and operated a mechanic shop in Hurst, Texas from 2014 to 2022 and continues hands-on repair work.
Content may combine manual references, general repair templates, and AI-assisted drafting. Confirm the source, vehicle configuration, and applicability before working. Report corrections through our contact page.
Last updated: 2026-11-01