tire options - non standard size question

[rdprdp01]

I guess tires are parts, right?  anyway, will a 150/70R18 fit on a 18" x 4" rim acceptably.  looks like 4.25" rim width is "ideal" but would it work on a 4" wheel width?  the swing arm looks plenty wide for another 10mm in width, but the present 140/70R18 comes a bit over 1/2" from the swing arm cross brace.  1/2" is 12.7mm.   70% of 140 is 98mm.  70% of 150 is 105mm.  going by straight calculations it looks like a 7mm increase in radius would fit.  Has anyone tried a 150/70R18 yet before?  if so, how did it turn out for handling?
thanks,
tdbru

Tires are definitely parts. To be candid, there has been much discussion in the CB1100 community about tires and oil!

I recently purchased tires for my CB1100 and remained true to Honda’s recommendation and ended up paying a premium. The ride is perfect, but pricey.

I believe this thread from the prior Forum may be of value to you:

http://cb1100forum.com/forum/showthread.php?pid=306802

If all goes well, you will be able to search this Forum at the end of May and source the same thread. Best of luck. David