18 wm3 or 19 wm2 rear wheel?

[limeyrob]

18 wm3  or 19 wm2 rear wheel?
My A10 "Special" (ie bitsa) has steel WM2 x 19 rims front and back but I'd quite like ally rims so I'f I'm going to all that hassle I could swap the rear to a WM3 x 18 at the same time.  I did many miles on an A65 with a WM3 x 18 rear and WN x 19 front and with a 400 rear tyre and a 3.25 front the handling was excellent and the rolling radii were the same.
What is the consensus? Pros and cons etc?
Thanks

[muskrat]

G'day Rob.
That's what I have on my Cafe. When I raced her I needed a better choice of tyres so laced a Akront flanged alloy rims with thicker stainless spokes. 110/80 18 rear, 100/90 19 front.
Cheers

[limeyrob]

I do like the look of that.  How is the tyre / chain / swing arm clearance?

[muskrat]

G'day Rob.
Just had a quick look. About 1/2" clearance so could easily go 120 tyre.
Cheers

[Rex]

Seems to be a better choice of rear tyres in 18" sizes too.