275/55R20 vs 275/70R18: Gas Mileage & Performance Comparison
* Below is a comparison table. Assuming 2 tires of the same manufacturer, material and tested on the same road conditions.
| 275/70R18 | 275/55R20 | |
| Wet/Snowy Roads | Reduced Traction | Better Traction |
| Rough Terrain | Smoother Ride | Reduced Stability |
| Handling/Steering | Less Responsive | Less Responsive |
| Gas Mileage | Better | Good |
| Road Noise | Quieter | Quieter |
| Cost | More Expensive | Less Expensive |
Can You Replace The 275/70R18 With The 275/55R20?
Definitely no, because these 2 tires are different overall rim sizes.
When you want to replace a different tire size, as a rule, for the rim diameter, you will need to be sure that your tires and rims are an exact match, e.g. a 275/70R18 tire will only fit on a 18″ diameter rim.
You Can check our tools and charts below to find your size:
