2018 Ford Focus ST Wheel Interchange

2018 Ford Focus ST Wheel Fitment Guide

Known OEM Fitment For 2018 Ford Focus ST

The verified fitment information available for the 2018 Ford Focus ST is listed below. Several wheel and tire measurements are not provided, and they may vary by market, equipment, wheel package, or replacement configuration. Do not use an unknown value as a purchasing specification without confirming it.

The 5x108 bolt pattern means the wheel has five fastener holes on a 108 mm pitch circle. The 63.4 mm center bore must be checked against the replacement wheel. A wheel with a larger bore may require correctly sized hub-centric rings, while a wheel with a smaller bore will not fit over the hub. Confirm the original wheel markings, the vehicle certification label, the owner’s manual, and Ford parts information before ordering.

How To Use The Wheel Interchange Calculator

Use the calculator to compare “Wheels from” a donor vehicle with the wheels “Installed on” your 2018 Ford Focus ST. Enter the donor wheel and tire information as accurately as possible, then review differences in diameter, width, offset, backspacing, and tire dimensions.

You can also select “Custom wheel size” to enter a rim diameter, rim width, and offset. Use “Custom tire size” to enter tire section width and aspect ratio. Since the calculator changes tire diameter when rim diameter changes, review the complete wheel and tire combination rather than comparing rim diameter alone.

Calculator results are a screening tool, not a guarantee of clearance or load capacity. Confirm the actual wheel markings, hub fit, brake clearance, suspension clearance, fender clearance, tire load index, speed rating, and vehicle-specific requirements before installation.

Fitment Checklist Before You Buy

Start with the confirmed 5x108 bolt pattern, 63.4 mm hub-bore requirement, and M12 x 1.5 thread specification. Then verify the missing diameter, width, offset, backspacing, and tire measurements from an OEM source or from the markings on the wheels and tires currently installed on the vehicle.

Check that the replacement wheel is approved for the vehicle’s weight and brake package. Compare its offset and width with the original assembly, and use the calculator to identify changes in inner clearance and outer protrusion. A wheel that bolts on can still contact the strut, brake caliper, suspension arm, fender, or bodywork.

Confirm the required lug nut seat type and fastener engagement separately from the thread size. Do not assume that the vehicle’s thread size proves that a particular lug nut is correct. After mounting, verify that the tire does not rub during steering, suspension compression, or full-load operation.

Plus Sizing And Common Upgrades

Plus sizing typically combines a larger rim diameter with a lower-profile tire so the overall tire diameter remains close to the original. The correct target cannot be stated here because the original rim and tire dimensions were not provided. Use the calculator to compare candidate combinations and review the change in overall diameter, sidewall height, width, and clearance.

A larger wheel or wider tire can change steering feel, road impact harshness, rolling resistance, wet-weather behavior, and the risk of curb or pothole damage. It may also reduce clearance to brake components or suspension parts. Do not choose a size solely because it appears in a general vehicle fitment search. Confirm it against the actual wheel design and your vehicle configuration.

Installation Tips

Clean the hub and wheel mounting surfaces before installation. Remove rust, paint buildup, and debris without damaging the mating surfaces. Make sure the wheel sits fully against the hub and that the fasteners match the wheel’s seat design.

Install the wheel by hand to prevent cross-threading. Tighten the fasteners in a crisscross pattern, then torque them to the Ford specification for the vehicle and wheel hardware. The correct torque value is not provided here, so confirm it in the owner’s manual or Ford service information rather than guessing.

After installation, rotate the steering from lock to lock and inspect for contact. Check clearance with the suspension loaded where practical, then perform a short low-speed test. Recheck fastener torque after the first drive and again according to the wheel manufacturer’s instructions.

Tools And Helpful Supplies

Useful supplies include a calibrated torque wrench, properly sized socket, jack and jack stands rated for the vehicle, wheel chocks, a tire pressure gauge, and a tread-depth or clearance inspection tool. A torque wrench helps reduce the risk of under-tightening or over-tightening wheel fasteners.

For measuring an unknown wheel, use a tape measure or caliper and read the stamped or cast markings on the back of the wheel. A digital caliper can help with hub-bore and hardware measurements, but it does not replace the vehicle manufacturer’s specifications.

FAQs

What is the bolt pattern for the 2018 Ford Focus ST?

The known bolt pattern is 5x108, meaning five wheel fasteners on a 108 mm pitch circle. Confirm the wheel’s actual markings and application before purchase.

What is the center bore for the 2018 Ford Focus ST?

The provided center-bore specification is 63.4 mm. A larger replacement-wheel bore may need hub-centric rings sized correctly for the vehicle hub and wheel. A smaller bore will not fit over the hub.

What lug thread size is listed for this vehicle?

The provided thread size is M12 x 1.5. Thread size alone does not identify the correct lug nut seat, nut shape, washer arrangement, or required fastener length. Match the hardware to the wheel and confirm it with Ford service information.

What wheel offset and width should I use?

The wheel offset and rim width are unknown from the supplied data. Confirm them from the original wheel markings, Ford documentation, or a qualified wheel supplier. Use the calculator to compare any proposed custom width and offset, then physically check clearance.

What tire size fits the 2018 Ford Focus ST?

The original tire section width, aspect ratio, and rim diameter were not provided, so a specific tire size should not be assumed. Read the tire sidewall, check the vehicle label and owner’s manual, and enter the confirmed dimensions into the calculator.

Can I use wheels from another vehicle?

Only if the complete fitment is verified. Compare the 5x108 bolt pattern, hub bore, wheel hardware, diameter, width, offset, brake clearance, load rating, and tire requirements. The calculator can compare dimensions, but it cannot certify structural strength or guarantee physical clearance.

Why did the calculator change the tire diameter?

Changing rim diameter changes the tire sidewall calculation in the comparison. Review the resulting overall tire diameter and not just the wheel diameter. A large change can affect clearance, speedometer behavior, gearing, ride quality, and electronic systems.

Where can I confirm the missing OEM specifications?

Check the original wheel cast or stamped markings, the tire sidewall, the driver-door certification label, the owner’s manual, Ford parts and service information, and a reputable wheel manufacturer’s application data. If sources disagree, verify the vehicle identification number, market, trim, brake package, and installed wheel before ordering.