2023 PORSCHE 911 GT3 RS · 992 · KNOWLEDGE CARD · SPECS READ 2026-09-18 · CATALOG VERIFIED SEP 4, 2026
2023 Porsche 911 GT3 RS — wheels, tires, fitment and brakes
IN SHORT
13 facts with a source, 6 marked missing. centerlock, 20–21-inch, ET25 to ET55; 1 listed wheel models pass the fitment gate. Nothing on this page is inferred: a row without a source says missing.
01Wheels
| FACT | VALUE | SOURCE |
|---|---|---|
| OE wheel, front | 10J × 20 ET45, forged, center-lock | Porsche Newsroom — '992 911 GT3 RS Press Kit' (PDF), Chassis section · Fitment fixture data/fitment-fixtures.json (992-GT3RS): APEX 992.1 GT3 RS fitment guide; retailer by-vehicle listing Sep 2 2026 “The new 911 GT3 RS comes standard with forged aluminum alloy center-lock wheels.” forged aluminum center-lock per Porsche; width/offset from the fixture |
| OE wheel, rear | 13J × 21 ET31, forged, center-lock | Porsche Newsroom — '992 911 GT3 RS Press Kit' (PDF), Chassis section · Fitment fixture data/fitment-fixtures.json (992-GT3RS): APEX 992.1 GT3 RS fitment guide; retailer by-vehicle listing Sep 2 2026 |
| Bolt pattern | center-lock (no bolt-on pattern) | Porsche Newsroom — '992 911 GT3 RS Press Kit' (PDF), Chassis section · Fitment fixture data/fitment-fixtures.json (992-GT3RS): APEX 992.1 GT3 RS fitment guide; retailer by-vehicle listing Sep 2 2026 |
| Hub bore | missing | missing · Not applicable to a center-lock hub in the bolt-on sense; no figure held. |
| Accepted offset range | ET25 to ET55 | Fitment fixture data/fitment-fixtures.json (992-GT3RS): APEX 992.1 GT3 RS fitment guide; retailer by-vehicle listing Sep 2 2026 |
| Minimum wheel diameter (brake clearance) | 20 in front / 21 in rear | Fitment fixture data/fitment-fixtures.json (992-GT3RS): APEX 992.1 GT3 RS fitment guide; retailer by-vehicle listing Sep 2 2026 center-lock only; the retailer lists two center-lock models |
02Tires
| FACT | VALUE | SOURCE |
|---|---|---|
| OE tire, front | 275/35 R20 | Porsche Newsroom — '992 911 GT3 RS Press Kit' (PDF), Chassis section “Road-legal sports tires measuring 275/35 R 20 at the front and 335/30 R 21 at the rear” |
| OE tire, rear | 335/30 R21 | Porsche Newsroom — '992 911 GT3 RS Press Kit' (PDF), Chassis section |
| Load index | missing | missing · Not stated in the press kit; the tire's own marking is the source. |
| Speed rating | missing | missing · Not stated in the press kit. |
| Tire pressure placard | missing | missing · Not read from a manufacturer document yet. |
03Brakes
| FACT | VALUE | SOURCE |
|---|---|---|
| Front rotor | 408 mm × 36 mm, ventilated | Porsche Newsroom — '992 911 GT3 RS Press Kit' (PDF), Chassis section “brake discs with a diameter of 408 millimeters are used on the front axle … the thickness of the discs has been increased from 34 to 36 millimeters” |
| Front rotor thickness | 36 mm | Porsche Newsroom — '992 911 GT3 RS Press Kit' (PDF), Chassis section The fixture previously held 34 mm (the GT3 figure); corrected to Porsche's stated 36 mm on 2026-09-18. |
| Front caliper | 6-piston aluminum monobloc fixed, 32 mm pistons | Porsche Newsroom — '992 911 GT3 RS Press Kit' (PDF), Chassis section “Aluminum monobloc fixed-caliper brakes with six pistons each … piston diameters have been increased from 30 to 32 mm” |
| Rear rotor | 380 mm, ventilated | Porsche Newsroom — '992 911 GT3 RS Press Kit' (PDF), Chassis section “The rear axle continues to be fitted with 380-mm brake discs and four-piston fixed-caliper brakes.” |
| Rear caliper | 4-piston fixed | Porsche Newsroom — '992 911 GT3 RS Press Kit' (PDF), Chassis section |
| Optional brake | PCCB: 410 mm front / 390 mm rear | Porsche Newsroom — '992 911 GT3 RS Press Kit' (PDF), Chassis section “The optionally available Porsche Ceramic Composite Brake (PCCB) has 410-mm discs on the front axle and 390-mm discs on the rear axle.” |
| Pad shape, front (FMSI) | missing | missing · FMSI pad shape not read from a brake maker's own catalog yet. |
| Pad shape, rear (FMSI) | missing | missing · FMSI pad shape not read from a brake maker's own catalog yet. |
408mm front rotors and center-lock hubs: 20-inch front / 21-inch rear center-lock wheels only. Source: Porsche Newsroom 992 GT3 RS press kit (408 mm front discs, 36 mm thick, 6-piston monobloc; 380 mm rear; PCCB 410/390) — corrected from 408x34 on 2026-09-18; APEX 992.1 GT3 RS fitment guide brake clearance list; retailer by-vehicle results (2 center-lock models).
04What fits (from the fitment gate)
1 listed models pass for the 2023 Porsche 911 GT3 RS; 1 have a maker reference image. Every one below was checked for bolt pattern, diameter, width, offset and brake clearance against the rows above.
- O.Z. RACING ATELIER FORGED ULTIMATE ALU CENTERLOCK — 20×10 ET45 · outboard face 0 mm vs OE
05What almost fits, and why
No listed wheel sits at the edge of the range for this car.
06Tire sizes
OE 275/35R20 front / 335/30R21 rear. Listed alternates: 275/35R20, 335/30R21.
07Pads — compounds by use, in the makers' own words
Street compounds bite from cold and dust less; track compounds need heat (Hawk's DTC ranges start at 400 °F) and are not listed for street. EBC says Yellowstuff is a street pad and that track use pushes past its 400 °C fade threshold. None of these makers publish a per-car pad recommendation here; per-car part numbers are missing until read from the maker's catalog.
| COMPOUND | STATED TEMPERATURES | DUST / NOTES | SOURCE |
|---|---|---|---|
| EBC Brakes Redstuff Ceramic fast street; 'Race Use: No' | not stated | 'Dust Rating: Low' — 'reducing dust by 60–90%' EBC: 'lowest dust fast street pad'; 'Nominal friction coefficient 0.5'; bed-in 'can be as long as 1000 miles'; ECE R90 approved (most part numbers). | EBC Brakes — Redstuff Ceramic Brake Pads |
| EBC Brakes Yellowstuff (4000 series) fast street; not recommended by EBC for dedicated track use | fade threshold 400 °C (750 °F) — 'the maximum expected temperature in fast street driving' | not stated as low dust EBC: 'We no longer recommend Yellow for dedicated track use'; 'track conditions can push brake temperatures above 500–600 °C (1100 °F)'. R90 approved for street use in Europe. | EBC Brakes — EBC Yellowstuff Fast Street Brake Pads |
| Hawk Performance HPS 5.0 street ('High Performance Street') | 100–750 °F operating; 100–550 °F optimal | not stated Hawk: 'shorter stopping distances, improved performance under heavy braking conditions, and street car friendly characteristics'; not compatible with carbon-ceramic rotors. | Hawk Performance — HPS 5.0 |
| Hawk Performance HP+ 'Ideal for Autocross' — low to mid temperature range; street + occasional track use per Hawk's placement | 100–800 °F operating; 300–600 °F optimal | not stated Not compatible with carbon-ceramic rotors. | Hawk Performance — HP+ |
| Hawk Performance DTC-60 motorsport — 'Sports Car/GT/GS, Open Wheel/Formula' among the listed series | 400–1600 °F operating; 700–1100 °F optimal | not stated Race compound; Hawk lists it for competition series, not street. Not compatible with carbon-ceramic rotors. | Hawk Performance — DTC-60 |
| Hawk Performance DTC-70 motorsport — 'extremely high torque and highly aggressive initial bite for cars with high deceleration rates' | 400–1600 °F operating; 800–1200 °F optimal | not stated Race compound; Hawk lists it as a split-friction partner with DTC-60. Not compatible with carbon-ceramic rotors. | Hawk Performance — DTC-70 |
Per-car pad part numbers and FMSI shapes: missing — not yet read from a maker's catalog. Brake buy links: none shown; no verified retailer brake URL is held for this vehicle.
?Questions answered from this data
- What wheels fit a 2023 Porsche 911 GT3 RS?
- What tire sizes fit a 2023 Porsche 911 GT3 RS?
- Will 335s fit a 2023 Porsche 911 GT3 RS?
- Why can't I run 19s on a 2023 Porsche 911 GT3 RS?
- What is the lightest wheel setup for a 2023 Porsche 911 GT3 RS?
- What is a daily-driver wheel and tire setup for a 2023 Porsche 911 GT3 RS?
- What offset works on a 2023 Porsche 911 GT3 RS?
- What is the biggest tire a 2023 Porsche 911 GT3 RS takes without changes?
- What are the factory wheel and tire specs of a 2023 Porsche 911 GT3 RS?
- What are the most popular wheels for a 2023 Porsche 911 GT3 RS?