305/55R20 vs 275/55R20: Gas Mileage & Performance Comparison
* Below is a comparison table. Assuming 2 tires of the same manufacturer, material and tested on the same road conditions.
| 275/55R20 | 305/55R20 | |
| Wet/Snowy Roads | Better Traction | Reduced Traction |
| Rough Terrain | Reduced Stability | Smoother Ride |
| Handling/Steering | Less Responsive | Better |
| Gas Mileage | Good | Better |
| Road Noise | Quieter | Quiet |
| Cost | Less Expensive | More Expensive |
Can You Replace The 275/55R20 With The 305/55R20?
No, both tires have the same rim diameter, but the 305/55R20 has a bigger overall diameter than the 275/55R20 which is 3.91% (1.3-inch).
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 275/55R20 tire will only fit on a 20″ diameter rim.
You Can check our tools and charts below to find your size:
