Compare your current wheels and tires against a new setup. See what changes before you buy.
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| MEASUREMENT | CURRENT | NEW | DIFFERENCE |
|---|---|---|---|
| Wheel size | — | — | — |
| Wheel offset | — | — | — |
| Backspacing (approx.) | — | — | — |
| Tire size | — | — | — |
| Overall diameter | — | — | — |
| Circumference | — | — | — |
| Sidewall height | — | — | — |
| Inner rim position (hub reference) | — | — | — |
| Outer rim position (hub reference) | — | — | — |
If your speedometer is accurate with the current tires, your actual speed on the new tires would be:
See how a rear gear swap changes highway RPM. Compare popular Mopar ratios side by side before making the switch.
Most traditional 727/904 automatics are 1.00 in third gear. Enter 0 for slip to see theoretical RPM; real non-lockup converters may run higher.
At 70 mph with 245/45R17 tires
Engine RPM at 70 mph, using the same tire and transmission setup.
Compare highway cruising RPM and see how fast each ratio travels at your target engine speed.
| REAR GEAR | 50 MPH | 60 MPH | 70 MPH | 80 MPH | MPH @ 3,000 RPM |
|---|
On mobile, swipe the table sideways to see every speed.