ABS size front tire on a non-ABS bike

Hi,
I accidentally ordered the wrong size front tire for my non-ABS 2001 ST 1100. I ordered the ABS equipped size - 120/70-18 when I should've ordered the 110/80-18 for non-ABS. Do I really need to return the tire or will the ABS tire be fine?
These are Metzler Z6s

You will probably be fine. I run the 120 on my 97 standard but I have an ABSII rim on it. Clearances should work as they do on mine.

Run with it, you will be happy.

I've run a few 120 sized Metzeler Z6's on my non ABS front with no problem, but your speedo will show you about 6 mph faster than you are actually going.