285/30R18 Specifications
Overall Diameter
62.8 cm
24.7 in
Sidewall Height
8.5 cm
3.4 in
Visible Sidewall
6.8 cm
2.7 in
Closest Match per Treadwidth See all 14 sizes →
| Tire Size | % Diff | @ 60 mph |
|---|---|---|
| 275/30R18 | -1.0% | 59.4 mph |
| 285/30R18Original | +0.0% | 60.0 mph |
| 295/30R18 | +1.0% | 60.6 mph |
| 305/30R18 | +1.9% | 61.1 mph |
| 315/25R18 | -2.1% | 58.7 mph |
51 compatible alternatives within 3% of the original diameter, organized by wheel diameter. The closest match per tread width within each section is shown in italics. All sizes are theoretical and may not actually be produced. Click a size to verify commercial availability.
Current Tire Pricing
Price availability updated June 2026. Actual prices may vary.
Tire Recommendations
Extreme Performance Summer
Track days, autocross, and maximum dry grip
Hoosier Track Attack Pro
Treadwear: 200
Nankang Sportnex CR-S
Treadwear: 200
Vitour Tempesta P1 P-01R
Treadwear: 200
Michelin Pilot Sport Cup 2 (240)
Treadwear: 240
Max Performance Summer
Spirited street driving and occasional track use
Michelin Pilot Sport 4S
Treadwear: 300
Ultra High Performance All-Season
Year-round daily driving with performance capability
How to Use This Information
- Stay within 3%: All listed tire sizes maintain proper speedometer accuracy and vehicle dynamics
- Consider aspect ratio: Lower numbers mean shorter sidewalls (better handling, harsher ride)
- Treadwidth matters: Wider tires typically offer more grip but may reduce fuel economy
- Check clearance: Ensure your vehicle has adequate wheel well and suspension clearance
Want to look up compatibility for a different tire size? Use our tire size compatibility lookup