2021 Acura NSX Wheel Interchange

2021 Acura NSX wheel fitment and interchange guide

tl;dr

The known OEM spec for this NSX includes 5x120, 70.1 mm center bore, M14x1.5 threads, and a listed wheel and tire of 19x8.5 ET55 with 245/35R19. Other factory sizes may exist on the rear or with packages. Use the on-page calculator to compare donor wheels and custom sizes before you buy. Keep clearances safe, stay hub centric, and match lug hardware to the wheel seat style.

Recommendation

Start from the known data, then validate the rest on the vehicle and with OEM sources.

• Use the calculator: set Installed on to 2021 Acura NSX. Enter the known baseline.
• If your NSX has staggered wheels, confirm the other axle. Check the door placard, owner’s manual, or dealership parts catalog.
• Compare donor wheels by bolt pattern first. Only 5x120 will bolt up without adapters.
• Match or exceed brake and suspension clearances. Watch inner clearance and outer poke in the calculator.
• If using aftermarket wheels with larger center bore, plan hub centric rings to 70.1 mm ID.
• Use M14x1.5 lug nuts or bolts as applicable, with the correct seat type for the wheel.
• Reuse or program TPMS sensors compatible with your NSX.

Known OEM fitment

These values are confirmed for at least one 2021 Acura NSX configuration. Other trims or axles may differ. Do not assume both axles match without checking.

If your car shows different sizes on the tire placard, use those as your baseline in the calculator.

Impact

Changing width, offset, or tire size alters more than looks. Here is what changes and how to read it in the calculator.

• Clearance to strut and liner: Inner clearance decreases as offset increases or width grows inward. Confirm you do not go negative.
• Fender poke: Outer position increases as offset decreases or width grows outward. Make sure the tire does not contact the fender at full lock or compression.
• Steering feel and scrub: Large offset shifts can change steering effort and feedback. Keep changes modest unless you have measured room.
• Ride height and speedometer: Tire overall diameter affects both. The calculator updates tire diameter when you change rim diameter. Aim for a small difference to maintain ride and readings.
• Unsprung mass: Bigger wheels and tires often weigh more. That can affect braking and ride quality.

Risks

• Brake caliper interference: The NSX has large calipers. Spoke shape and barrel profile matter. Do a template test or trial fit before mounting tires.
• Incorrect seat type: Using conical hardware on a ball seat wheel, or vice versa, can loosen under load.
• Poor centering: Skipping hub centric rings on larger bore wheels may cause vibration.
• Thread engagement: Short shank nuts or thick wheel pads reduce engagement. Verify safe engagement per OEM guidance.
• TPMS issues: Wrong sensors or missed relearn can trigger warnings.
• Rubbing under load: What looks fine static can rub over bumps or at full lock. Check with suspension compressed and wheels turned.

Next actions

• Confirm your current OEM sizes on the door placard and in the owner’s manual.
• Open the calculator on wheelinterchange.com. Set Installed on to 2021 Acura NSX.
• Enter the known baseline or your placard sizes. Save that as stock.
• Test donor wheels: match 5x120, then adjust width and offset to keep safe clearances.
• If changing rim diameter, use the calculator to pick a tire that keeps overall diameter close to stock.
• Select hardware: M14x1.5 lugs with the correct seat. Add 70.1 mm hub centric rings if your wheel bore is larger.
• Plan a test fit. Spin the wheel by hand, turn lock to lock, compress suspension if possible.
• Torque to the factory spec from the service manual. Recheck torque after 50 to 100 miles.

Gotchas and quick tips

• Staggered setups are common. Verify both axles. Do not mirror front specs to the rear without checking.
• Aftermarket wheel load rating should meet or exceed OEM. Check the rating stamp.
• Valve stems and TPMS: Use compatible clamp in stems if required by your sensor type.
• Spacers change effective offset and hardware needs. Use hub centric spacers with matching 70.1 mm bore, and correct extended hardware if specified by the spacer manufacturer.

How to use the calculator effectively

This is the workflow I use in the shop for quick, safe checks.

1. Set Installed on to 2021 Acura NSX. Enter the known wheel and tire as stock.
2. Under Wheels from, pick your donor vehicle or enter Custom wheel size to test fit ideas.
3. Adjust width, offset, and diameter one variable at a time. Watch inner clearance and outer poke readouts.
4. Change Custom tire size to keep overall diameter close. The calculator shows tire diameter change and speed difference.
5. Document a setup that maintains clearance. Then verify physically before mounting tires.

Tools and supplies

• 1-2 inch drive torque wrench
• M14x1.5 lug nuts, correct seat type
• 70.1 mm ID hub centric rings

Notes on missing or varying specs

If a value is unknown for your trim or axle, confirm it with these sources:

• Door jamb tire and loading placard for sizes and pressures
• Acura service manual or OEM parts catalog for offsets and hardware
• Dealer parts counter with your VIN for exact build data

Final check: measure twice, test fit once, then mount tires. This keeps your NSX safe, smooth, and aligned with OEM intent.