295/50R18
295/50R18 is uncommon as OEM fitment but appears as an aftermarket upsize option. At 29.61″ diameter with a 5.81″ sidewall (50% of section width), this size turns 681 revolutions per mile.
About 295/50R18
295/50R18 is less common as a factory fitment but is available as an aftermarket size, so SKU selection is narrower than mainstream OEM sizes. At 29.61″ overall diameter, 295/50R18 turns 681 revolutions per mile, which is the reference point the factory speedometer and odometer were calibrated against. The 50% aspect ratio gives it a moderate sidewall suited to sporty street driving and responsive turn-in. The 18″ rim pairing is typical for full-size truck, premium SUV, and sport-sedan platforms, so compatible wheels are easy to source new or used. Going one step shorter to 285/50R18 drops diameter by 1.33%, which stays within the ±3% fitment safe zone for most vehicles. Stepping up to 275/55R18 adds 1.00% diameter — also inside the safe window, with marginally taller ride height. If you are shopping for a direct replacement, any tire within roughly ±0.7″ of the 29.61″ stock diameter (about ±2% in percentage terms) will keep ABS, TPMS, and odometer readings inside the vehicle's designed tolerance.
Compare with another size
275/65R18 or "33" for inch aliases295/50R18
- Diameter
- 29.61″ / 752.2mm
- Section Width
- 11.61″
- Sidewall
- 5.81″ / 147.5mm
- Circumference
- 93.04″
- Revs/Mile
- 681
275/50R18
- Diameter
- 28.83″ / 732.2mm
- Section Width
- 10.83″
- Sidewall
- 5.41″ / 137.5mm
- Circumference
- 90.56″
- Revs/Mile
- 700
Speedometer & Diameter Impact
At an indicated 60 mph, your actual speed is 58.4 mph (93.99 km/h). Your speedometer reads 2.66% high versus actual speed.