SidewallerTire & wheel calculators

185/65R15 vs 215/45R17

215/45R17 is 0.6% taller (+0.15 in) and 1.18 in wider than 185/65R15.

OK
Close match

215/45R17 is 0.6% taller than 185/65R15. That is inside the ±3% most shops treat as a straight swap.

185/65R15215/45R17Change
Diameter24.47″24.62″+0.15″+0.6%
Width7.28″8.46″+1.18″+16.2%
Sidewall4.73″3.81″−0.93″−19.5%
Circumference76.9″77.3″+0.5″+0.6%
Wheel15″17″+2″
Revs per mile824819−5
SideTread
185/65R15215/45R17
Speedometer shows 60 mph60.4mph

Real speed on 215/45R17.

Ground clearance+0.07in

Change in height under the axle.

Width per side+0.59in

On the same wheel, split inboard and outboard.

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185/65R15 or 215/45R17?

Can I use 215/45R17 instead of 185/65R15?

215/45R17 is 0.6% taller than 185/65R15. That is inside the ±3% most shops treat as a straight swap. Also match or beat the original load index and speed rating, and check that the wheel width suits the new tire.

Will my speedometer be off?

At an indicated 60 mph on 215/45R17 you are really doing 60.4 mph if the speedometer was set up for 185/65R15. Going the other way, 185/65R15 would make it read 59.6 mph at a real 60.

How much ground clearance does it change?

Half the diameter difference: +0.07 in (+2 mm) under the axle.

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