175/65R13 vs 165/70R13
165/70R13 is 0.6% taller (+0.14 in) and 0.39 in narrower than 175/65R13.
165/70R13 is 0.6% taller than 175/65R13. That is inside the ±3% most shops treat as a straight swap.
Real speed on 165/70R13.
Change in height under the axle.
On the same wheel, split inboard and outboard.
Shop 165/70R13 tires
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175/65R13 or 165/70R13?
Can I use 165/70R13 instead of 175/65R13?
165/70R13 is 0.6% taller than 175/65R13. 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 165/70R13 you are really doing 60.4 mph if the speedometer was set up for 175/65R13. Going the other way, 175/65R13 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.