255/30R22 vs 235/65R16
235/65R16 is 0.0% taller (+0.00 in) and 0.79 in narrower than 255/30R22.
235/65R16 and 255/30R22 are the same overall diameter, so the speedometer stays accurate.
Real speed on 235/65R16.
Change in height under the axle.
On the same wheel, split inboard and outboard.
Shop 235/65R16 tires
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255/30R22 or 235/65R16?
Can I use 235/65R16 instead of 255/30R22?
235/65R16 and 255/30R22 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 235/65R16 you are really doing 60.0 mph if the speedometer was set up for 255/30R22. Going the other way, 255/30R22 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.