165/65R14 vs 175/70R14
175/70R14 is 5.3% taller (+1.20 in) and 0.39 in wider than 165/65R14.
175/70R14 is 5.3% taller than 165/65R14. Beyond 5% you usually need a lift or leveling kit, a speedometer recalibration and sometimes new gears.
Real speed on 175/70R14.
Change in height under the axle.
On the same wheel, split inboard and outboard.
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165/65R14 or 175/70R14?
Can I use 175/70R14 instead of 165/65R14?
175/70R14 is 5.3% taller than 165/65R14. 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 175/70R14 you are really doing 63.2 mph if the speedometer was set up for 165/65R14. Going the other way, 165/65R14 would make it read 57.0 mph at a real 60.
How much ground clearance does it change?
Half the diameter difference: +0.60 in (+15 mm) under the axle.