245/45R20 vs 245/40R20: Gas Mileage & Performance Comparison
* Below is a comparison table. Assuming 2 tires of the same manufacturer, material and tested on the same road conditions.
|Wet/Snowy Roads||Better Traction||Reduced Traction|
|Rough Terrain||Reduced Stability||Smoother Ride|
|Handling/Steering||Less Responsive||Less Responsive|
|Cost||Less Expensive||More Expensive|
Can You Replace The 245/40R20 With The 245/45R20?
No, both tires have the same rim diameter, but the 245/45R20 has a bigger overall diameter than the 245/40R20 which is 3.36% (0.96-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 245/40R20 tire will only fit on a 20″ diameter rim.
You Can check our tools and charts below to find your size: