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Auf los! · 05-30-2019, 04:27 PM

I read an article recently that suggested that when you increase your wheel size, but keep the same rolling diameter, e.g., going from stock 17" wheels to aftermarket 19", known as "+2," you should increase your tire pressure to make up for the smaller volume of air in the 19" tires. But how much? Is there a formula for this?

My 17" tire pressures were 29psi front and 36psi rear. What pressure should my 19" tires be?

05-30-2019, 04:27 PM	#1
Auf los! Registered User Join Date: Nov 2008 Location: Wilton, CT Posts: 195	Tire pressure when +2 I read an article recently that suggested that when you increase your wheel size, but keep the same rolling diameter, e.g., going from stock 17" wheels to aftermarket 19", known as "+2," you should increase your tire pressure to make up for the smaller volume of air in the 19" tires. But how much? Is there a formula for this? My 17" tire pressures were 29psi front and 36psi rear. What pressure should my 19" tires be? __________________ 2001 Boxster S 6-speed, 2013 Boxster S PDK