255/30R22 vs 285/35R22
285/35R22 is 6.5% taller (+1.83 in) and 1.18 in wider than 255/30R22.
285/35R22 is 6.5% taller than 255/30R22. Beyond 5% you usually need a lift or leveling kit, a speedometer recalibration and sometimes new gears.
Real speed on 285/35R22.
Change in height under the axle.
On the same wheel, split inboard and outboard.
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255/30R22 or 285/35R22?
Can I use 285/35R22 instead of 255/30R22?
285/35R22 is 6.5% taller than 255/30R22. 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 285/35R22 you are really doing 63.9 mph if the speedometer was set up for 255/30R22. Going the other way, 255/30R22 would make it read 56.3 mph at a real 60.
How much ground clearance does it change?
Half the diameter difference: +0.92 in (+23 mm) under the axle.