FITMENT LAB
FITMENT-VERIFIED

2023 PORSCHE 911 GT3 RS · 992 · VERIFIED ON SEP 4, 2026

What are the factory wheel and tire specs of a 2023 Porsche 911 GT3 RS?

Factory front: 20×10 ET45 on 275/35R20; rear 21×13 ET31 on 335/30R21. Bolt pattern centerlock, hub bore null mm, lug thread center-lock nut (600 Nm), front rotor 408 mm.

IN SHORT

Factory front: 20×10 ET45 on 275/35R20; rear 21×13 ET31 on 335/30R21.

2023 Porsche 911 GT3 RS on its factory wheels

01Specification

FRONT
20×10 ET45
FRONT TIRE
275/35R20
REAR
21×13 ET31
REAR TIRE
335/30R21
BOLT
centerlock
BORE
mm
LUG
center-lock nut (600 Nm)
FRONT ROTOR
408x34mm (PCCB 410x34mm)

wheel: forged aluminum center-lock (magnesium optional with Weissach) · front: 20x10 ET45 — 275/35R20 · rear: 21x13 ET31 — 335/30R21

Center-lock is obvious: one large center nut, no lug bolts. The standard 992 GT3 can be optioned either way; the RS is center-lock only.

The 991.2 GT3 RS (2019) is also center-lock but runs 20-inch front AND rear with 265/35-20 / 325/30-21 — different rear diameter. Confirm the generation before quoting sizes.

02OE-size tires sold for it

→Verified for this car

MICHELIN
PILOT SPORT S 5
275/35ZR20 & 335/30ZR21 · Max Performance Summer
$1,896 / set, list price Sep 4, 2026
Check fit & buy →
MICHELIN
PILOT SPORT CUP 2 (240)
275/35ZR20 & 335/30ZR21 · Extreme Performance Summer
$2,548 / set, list price Sep 4, 2026
Check fit & buy →
PIRELLI
P ZERO CORSA (PZC4)
275/35ZR20 & 335/30ZR21 · Streetable Track & Competition
$3,171 / set, list price Sep 4, 2026
Check fit & buy →

Fitment is computed from published vehicle data and the retailer's listed sizes (catalog 2026-09-04-tirerack-d, verified on Sep 4, 2026). Prices are list prices on that date. Verify with your installer before you buy. Buy links may be affiliate links.

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