175/65R13 vs 165/80R13
165/80R13 is 6.5% taller (+1.44 in) and 0.39 in narrower than 175/65R13.
165/80R13 is 6.5% taller than 175/65R13. Beyond 5% you usually need a lift or leveling kit, a speedometer recalibration and sometimes new gears.
Real speed on 165/80R13.
Change in height under the axle.
On the same wheel, split inboard and outboard.
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175/65R13 or 165/80R13?
Can I use 165/80R13 instead of 175/65R13?
165/80R13 is 6.5% taller than 175/65R13. Beyond 5% you usually need a lift or leveling kit, a speedometer recalibration and sometimes new gears. 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 165/80R13 you are really doing 63.9 mph if the speedometer was set up for 175/65R13. Going the other way, 175/65R13 would make it read 56.3 mph at a real 60.
How much ground clearance does it change?
Half the diameter difference: +0.72 in (+18 mm) under the axle.