305/45R22 vs 305/70R16
305/70R16 is 0.0% taller (+0.00 in) and the same width than 305/45R22.
305/70R16 and 305/45R22 are the same overall diameter, so the speedometer stays accurate.
Real speed on 305/70R16.
Change in height under the axle.
On the same wheel, split inboard and outboard.
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305/45R22 or 305/70R16?
Can I use 305/70R16 instead of 305/45R22?
305/70R16 and 305/45R22 are the same overall diameter, so the speedometer stays accurate. 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 305/70R16 you are really doing 60.0 mph if the speedometer was set up for 305/45R22. Going the other way, 305/45R22 would make it read 60.0 mph at a real 60.
How much ground clearance does it change?
Half the diameter difference: +0.00 in (+0 mm) under the axle.