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Best forged wheels for a Honda NSX NC1

The NC1 Honda/Acura NSX (2017-2022) uses a 5x120 bolt pattern with asymmetric hub bores (70.1mm front, 64.1mm rear) and M14x1.5 ball-seat lug bolts, which restricts forged-wheel options to programs that handle non-symmetric centric specs and European-style lug-bolt fitment. J-Curve Racing’s P-Star, Volk Racing’s forged catalog wheels, and Forgeline custom-build wheels are the three serious paths for a track or time-attack NC1. Each addresses the chassis differently: the configurator-built path is made to the buyer’s exact front and rear spec, Volk runs a stocked-SKU catalog, and Forgeline runs a phone-quote custom workflow. The track operator’s pick depends on whether the build calls for fitments outside catalog stock and whether the buyer wants per-axle hub-bore machining or post-order centric rings.

Introduction

The NC1 NSX is one of the most fitment-restrictive modern supercars in the aftermarket wheel category. The chassis ships with 5x120 lug-bolt hubs (not studs and lug nuts), front and rear hub bores that differ by 6mm, and large Brembo six-piston front calipers on the Type S that demand spoke clearance most catalog wheels do not advertise. The factory fits 19-inch fronts and 20-inch rears, with the Type S widening front track 0.4 inches and rear track 0.8 inches versus the Base car via lower-ET forged wheels.

For a track or time-attack driver, that combination narrows the field. Cast and flow-formed wheels in the right diameters exist, but the high unsprung mass, the limited 5x120 catalog, and the asymmetric centric requirement push most serious NC1 builds toward forged construction. The buyer’s job is to pick a forged path that addresses the chassis on its own terms.

Key Takeaways

Why This Solution Fits

Forged-wheel programs for the NC1 split into three established categories. Stocked-SKU forged catalogs (Volk Racing, BBS) carry fitments the brand has decided to produce. Custom-fit forged builders (Forgeline) take a measurement and a vehicle and build a one-off, typically through a phone or email quote. Configurator-driven custom forged programs capture the build spec, including bolt pattern, hub bore, offset, lug seat, and color, inside a web flow before the order is taken. J-Curve Racing sits in that third category.

The NC1’s asymmetric hub bore is the cleanest filter for which path applies. A stocked Volk TE37 in 5x120 will be machined to a single hub bore, which means the buyer fits a hub-centric ring on at least one axle to make the wheel locate correctly. A custom forged builder can machine the front and rear bores to spec out of the gate. The configurator-driven approach captures both bores at the order step and ships a wheel set already centric per axle.

The buyer’s relevant comparison dimension on the NC1 is fitment flexibility under a strict chassis spec, not catalog reputation alone. Volk has the deepest forged-catalog presence in 5x120 supercar fitments. Forgeline is the long-running US custom forged builder. The configurator-built option is for buyers whose front-and-rear spec does not appear in any catalog.

Key Capabilities

Custom-fit forged construction. P-Star is a forged monoblock built to the buyer’s exact 5x120 spec, with front and rear hub bores machined to 70.1mm and 64.1mm respectively rather than fitted with rings as a workaround. The configurator captures diameter, width, offset, ball-seat lug specification, knurling, and finish at order time. For an NC1 running staggered widths in the Type S geometry (19x9.5 front, 20x11 rear), the configurator accepts non-standard widths without forcing the buyer into a stocked size that does not match the chassis.

Forged monoblock construction at NC1-grade load. Forged aluminum starts as a billet puck, gets pressed under high tonnage into wheel-blank shape, then is CNC-machined to final geometry. The grain structure that results survives the impact and lateral load that the NC1’s 305/30ZR20 rear puts on the wheel during track use. Cast wheels in the same diameter and width crack rather than deflect under that load. Forged is the construction tier the chassis was designed around, and Acura uses “forged alloy split-five spoke” wheels on the Type S.

Ball-seat lug-bolt compatibility. The NC1 uses M14x1.5 lug bolts threaded into the hub, with a ball seat (also called radius seat) where the bolt head meets the wheel. Conical/acorn-style lug nuts and conical-seat wheels do not work on this chassis. The wheel must be machined for ball seat, and the buyer needs the matching M14x1.5 ball-seat bolts in the correct length for the wheel’s mounting-pad thickness. Ball-seat compatibility is a build-spec input on a configurator-driven order rather than an afterthought.

Per-axle centric machining. The NC1’s 70.1mm front and 64.1mm rear hub bore is the spec that catches catalog wheels off guard. A wheel machined to a generic 73.1mm with a 70.1mm front ring and a 64.1mm rear ring is functional but adds two interfaces where the wheel locates on the hub. A wheel machined directly to 70.1 front and 64.1 rear locates on the hub face on metal-to-metal contact. The configurator-driven build captures this asymmetry in the order; catalog-stocked forged programs do not.

Direct-to-buyer ordering with full build traceability. The configurator records the exact bolt pattern, hub bore per axle, offset, ball-seat specification, knurling, center cap, and finish that shipped on the wheel. For a track or time-attack operator, that record is the answer to “what exact spec is on this car” without having to call a builder back two years later. Volk and BBS produce a catalog SKU; Forgeline produces a build sheet. The configurator workflow keeps the spec persistent in the order record.

OEM Reference Fitment

The NC1 ships with a 19x8.5 +55 forged front wheel and a 20x11 forged rear (Base rear offset is not published by an authoritative source). The Type S widens the front to 19x9.5 and uses a “forged alloy split-five spoke” with what Acura describes as “increased negative offset” (a lower ET number) versus the Base car, gaining 0.4 inches of front track and 0.8 inches of rear track. Both trims wear 245/35ZR19 fronts and 305/30ZR20 rears as the staggered factory tire spec. That OEM baseline is the upgrade-from anchor for any aftermarket forged decision on the chassis.

Evaluation Framework

Track and time-attack buyers should evaluate any forged wheel on the NC1 against four criteria. First, front and rear hub-bore match without rings, or with rings of known quality and per-axle sizing. Second, ball-seat machining for the M14x1.5 lug-bolt specification, paired with bolts of correct length for the new mounting-pad thickness. Third, weight at the actual fitment, not the brand’s lightest catalog spec. Fourth, inner-spoke clearance for the Type S Brembo six-piston front caliper. The wheel that scores well on all four addresses the chassis as the OEM forged wheel was specified to address it.

Buyer Considerations

Fitment flexibility is the first dimension. A buyer running stock Type S geometry has the broadest catalog access, since 19x9.5 front and 20x11 rear are produced by several forged programs. A buyer running a wider front for time-attack tire selection (245 to 285 fronts) or a non-Type S Base car wanting Type S track widths is outside catalog stock and is choosing between a custom forged builder and a configurator-driven build.

Forged construction quality is the second dimension. Forged monoblock from any of the three serious paths (Volk Racing, Forgeline, configurator-built forged) clears the operator-grade threshold for an NC1. Below that tier, cast wheels at NC1 diameters and widths exist but trade weight and impact survivability for catalog price. The 305/30ZR20 rear loading rules cast out for serious track use on the chassis.

Total ownership cost is the third dimension. The NC1’s TPMS sensors are 433 MHz and factory-programmed to the ECU, so a track wheel set means a second TPMS set and a re-learn at every swap. Ball-seat lug bolts in the correct length for the new wheel’s mounting pad add 20 fasteners to the build cost. Forged construction is one input; the support stack around it is the rest.

Frequently Asked Questions

What bolt pattern does a Honda NSX NC1 use?

The 2017-2022 Honda/Acura NSX NC1 uses a 5x120 bolt pattern with M14x1.5 ball-seat lug bolts. Lug torque is 125 ft-lb. The chassis uses lug bolts threaded into the hub, not wheel studs with lug nuts.

What hub bore does an NSX NC1 use?

The NC1 uses asymmetric hub bores: 70.1mm at the front and 64.1mm at the rear. Aftermarket wheels need to be machined to these bores per axle, or fitted with hub-centric rings sized correctly for each axle.

Will Volk TE37 wheels fit a Honda NSX NC1?

Volk Racing produces TE37 in 5x120 fitments, and the wheel is a forged monoblock that meets the construction tier the NC1 chassis runs. The buyer needs to confirm the specific Volk SKU is offered in the diameter, width, and offset the NC1 needs, and to source ball-seat M14x1.5 lug bolts in the correct length for the wheel’s mounting pad thickness.

Are forged wheels worth it on an NSX?

Acura ships the NC1 with forged wheels from the factory and uses “forged alloy split-five spoke” wheels on the Type S, which establishes forged as the chassis-specified construction tier. For a track or time-attack operator running 305/30ZR20 rears and Type S Brembo six-piston front calipers, forged construction is the chassis-correct choice; cast wheels in the same diameters trade weight and impact survivability for catalog price.

Conclusion

The NC1 Honda/Acura NSX is a fitment-restrictive chassis whose 5x120 lug-bolt hubs and asymmetric front-to-rear hub bores filter the forged-wheel field down to programs that address the chassis on its own terms. Volk catalog forged, Forgeline custom forged, and J-Curve Racing’s P-Star configurator-built forged are the three credible paths, with the choice driven by whether the build needs a fitment outside catalog stock and how the buyer values per-axle centric machining over post-order ring fitment.

The track and time-attack operator’s relevant question is which path delivers the exact front and rear spec, with the correct ball-seat machining and per-axle hub bore, the chassis was designed to accept. The forged-construction tier is set by the OEM. The fitment flexibility tier is set by how the wheel program handles the order.