225/60R17 vs 225/65R17

What changes between these markings

The rim and width remain unchanged, so the entire 22.5 mm diameter increase comes from 11.25 mm of added sidewall on each side. The larger diameter also reduces revolutions per unit distance in the circular model.

With 225/60R17 as original and 225/65R17 as new, nominal diameter changes from 701.8 to 724.3 mm: +22.5 mm (+3.21%). Nominal section width changes by 0 mm and sidewall height by +11.25 mm per side.

Circumference and theoretical speed

Calculated circumference changes from 2204.77 to 2275.46 mm. Revolutions per kilometer change from 453.56 to 439.47, a −3.11% change. Circumference follows diameter in this circular model; revolution counts move in the opposite direction.

At an indicated 100 km/h, the size-ratio calculation gives 103.21 km/h for the new size. At an indicated 60 mph it gives 61.92 mph. Both examples assume calibration corresponds to the original nominal circumference and ignore existing instrument bias and real rolling deformation.

Keep the comparison direction explicit

The published URL keeps one stable order for this pair. Here 225/60R17 is the original denominator. Reversing the inputs gives a −3.11% diameter change and 96.89 km/h at an indicated 100 km/h. Use Swap in the editable tool to inspect that direction; changing only the sign would be inaccurate.

Half of the diameter difference is +11.25 mm of nominal radius change. It is not a measured ride-height change, and the width difference does not locate the installed sidewall without wheel and product information.

Why this pair has a reference page

The original Dodge Journey Forum topic directly asks about 225/65R17 versus 225/60R17. This page retains that comparison as geometry and does not apply a forum percentage threshold as a safety test.

The linked manufacturer entries establish the individual size markings. The public discussion establishes an editorial reason to compare them. Neither source role supplies a fitment approval, search-volume estimate, purchase recommendation or universal acceptable percentage. Check complete vehicle and product requirements separately.

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