What do you consider wide? I only ask because the only tire size reference I am seeing on this thread is mine about my 225/60-14 on the front and 245/60-14 on the back, and 66fs saying he ran 195/55R -15. I wouldn't really call any of those wide.
Just to clarify,.... You do know that tire with is by the first number, not the series of the tire, right. The series of the tire (55, 60, 70) is the aspect ratio which is a percentage of the width. So the 225/70-14 that you are running on the back is a 225 millimeter wide tire, the "70" designates that the side wall of the tire is 70% of the width, and the 14 is the rim size. So your 225/70r-14 is actually wider than 66fs tire that is 195/55r-15.
That means my 245/60r-14 on the back of mine are only 20 millimeters (less than an inch) wider than your P225/70r-14, but yours have a taller side wall, so it will be taller. 245/60-14 is 9.7" wide x 25.6" tall. 225/70-14 is 8.9" wide x 26.4" tall.