SidewallerTire & wheel calculators

165/65R13 vs 155/70R13

155/70R13 is 0.5% taller (+0.10 in) and 0.39 in narrower than 165/65R13.

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Close match

155/70R13 is 0.5% taller than 165/65R13. That is inside the ±3% most shops treat as a straight swap.

165/65R13155/70R13Change
Diameter21.44″21.54″+0.10″+0.5%
Width6.50″6.10″−0.39″−6.1%
Sidewall4.22″4.27″+0.05″+1.2%
Circumference67.4″67.7″+0.3″+0.5%
Wheel13″13″Same
Revs per mile940936−4
SideTread
165/65R13155/70R13
Speedometer shows 60 mph60.3mph

Real speed on 155/70R13.

Ground clearance+0.05in

Change in height under the axle.

Width per side−0.20in

On the same wheel, split inboard and outboard.

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165/65R13 or 155/70R13?

Can I use 155/70R13 instead of 165/65R13?

155/70R13 is 0.5% taller than 165/65R13. 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 155/70R13 you are really doing 60.3 mph if the speedometer was set up for 165/65R13. Going the other way, 165/65R13 would make it read 59.7 mph at a real 60.

How much ground clearance does it change?

Half the diameter difference: +0.05 in (+1 mm) under the axle.

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