2023 PORSCHE 911 GT3 RS · 992 · KNOWLEDGE CARD · SPECS READ 2026-09-18 · CATALOG VERIFIED SEP 4, 2026
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.
| 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 |
| 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. |
| 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).
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.
No listed wheel sits at the edge of the range for this car.
OE 275/35R20 front / 335/30R21 rear. Listed alternates: 275/35R20, 335/30R21.
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.