over all diameter

stupid question to some but i need to know, I am running a 20" wheel and the tires are 225 35 20 what is the over all diameter of what i am running, do not have the wheels and tires yet need the over all diameter for some measuring. And if i already have a 14" wheel what size tire would i need to get to match the over all diameter of the 20" wheels. Thanks, for any help

www.eunos.com/tirecalc.

ur 225/35/20's are 26.2'' overall...i got that from superbuytire.com

They also make a 225/30/20 that is 25.31" tall. Call me if you want some 931-962-4646 L8R

(tire width) times (sidewall percentage) divided by (25.4) times (2) plus (rim size) =
(225) x (0.35) / 25.4 x 2 + (20) = 26.2

ihave 225/35 20 nankang on the rear of mine. ther on a 8 in rim t.

Thanks everyone for there help. Thats what i needed to know