You'll lose almost 2/3" clearance between the tire and the fender. I don't know what the clearance is normally with a stock tire. The speedometer change will be towards being more accurate (around 5% lower reading than stock or 3.43 mph to the good at 65 indicated). You will also sit 2/3" higher.
The 180/65 is the more popular choice. It is slightly wider and barely shorter making it the better choice for most people. It also has the better load rating.
Edited to correct fraction error (3/4 vs 2/3) and add mileage differential.
2013 V Star 1300 Deluxe
OEM Tall Sissy Bar
Memphis Shades Fork Deflectors
Bridgestone Exedra Max Belted Tires
Baron's RSTD 7308 bar
Last edited by sparkn; 02-21-2014 at 07:31 PM.