225/35R19 vs 245/40R19
245/40R19 is 6.0% taller (+1.52 in) and 0.79 in wider than 225/35R19.
245/40R19 is 6.0% taller than 225/35R19. Beyond 5% you usually need a lift or leveling kit, a speedometer recalibration and sometimes new gears.
Real speed on 245/40R19.
Change in height under the axle.
On the same wheel, split inboard and outboard.
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225/35R19 or 245/40R19?
Can I use 245/40R19 instead of 225/35R19?
245/40R19 is 6.0% taller than 225/35R19. 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 245/40R19 you are really doing 63.6 mph if the speedometer was set up for 225/35R19. Going the other way, 225/35R19 would make it read 56.6 mph at a real 60.
How much ground clearance does it change?
Half the diameter difference: +0.76 in (+19 mm) under the axle.