225/50R17 vs 235/55R17
235/55R17 is 5.1% taller (+1.32 in) and 0.39 in wider than 225/50R17.
235/55R17 is 5.1% taller than 225/50R17. Beyond 5% you usually need a lift or leveling kit, a speedometer recalibration and sometimes new gears.
Real speed on 235/55R17.
Change in height under the axle.
On the same wheel, split inboard and outboard.
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225/50R17 or 235/55R17?
Can I use 235/55R17 instead of 225/50R17?
235/55R17 is 5.1% taller than 225/50R17. 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 235/55R17 you are really doing 63.1 mph if the speedometer was set up for 225/50R17. Going the other way, 225/50R17 would make it read 57.1 mph at a real 60.
How much ground clearance does it change?
Half the diameter difference: +0.66 in (+17 mm) under the axle.