Tire fitment
The 2022-2026 Rivian R1S base tire size is 275/55R21 — 275 mm wide with a 55% aspect ratio on 21″ rims. 4 OEM sizes are available across trims.
2022-2026 Rivian R1S
275/55R2132.9″ overall diameter · 151.3 mm sidewall · ~613 rev/mi
| Trim | Tire size | Rim | Diameter | vs Base |
|---|---|---|---|---|
| 21" Road ★ | 275/55R21 | 8.5×21″ | 32.9″ (835.9 mm) | — |
| 20" All-Terrain | 275/65R20 | 8.5×20″ | 34.1″ (865.5 mm) | +3.54% |
| 20" All-Season (Gen 2, 2025+) | 275/60R20 | 9×20″ | 33″ (838 mm) | +0.25% |
| 22" Sport | 275/50R22 | 8.5×22″ | 32.8″ (833.8 mm) | -0.25% |
The 2022-2026 Rivian R1S ships with 275/55R21 tires on the base trim — that's an overall diameter of 32.9″. The 275 mm width and 55% sidewall ratio give you 151.3 mm of sidewall cushion between the rim and the road.
Match the load index and speed rating from your door-jamb placard — not just the size. If you're switching sizes, keep the overall diameter within ~3% to avoid speedometer error and potential ABS/traction-control issues.
Factory fitment for the 2022-2026 Rivian R1S; verify against your door-jamb placard or owner's manual.
The base 2022-2026 Rivian R1S uses 275/55R21 tires — 275 mm wide, 55% aspect ratio, on 21-inch rims. The overall diameter is 32.9″ (835.9 mm). Higher trims use different sizes — see the table above. Confirm against your door-jamb placard.
Yes, within limits. Keep the overall diameter within about 3% of 32.9″ to avoid speedometer error and clearance issues. A wider tire may improve grip, but match the load and speed ratings your R1S requires.
275/55R21 tires have an overall diameter of 32.9″ (835.9 mm), with a 151.3 mm sidewall height. That's about 613 revolutions per mile.
The 2022-2026 Rivian R1S tire sizes shown are OEM factory fitments. Confirm your exact tire size, load rating, and speed rating against the door-jamb placard or owner's manual before buying tires.