I think you'd need a custom swingarm. I know you can go to 200 on the 1100 with the stock swingarm/rim, but thats about the limit. A 280 is is an 11" wide tire sort of. it's a measure of the tread side to side. Whereas the stock tire is about 7".
2005 1100 Custom
ORKed 5/16" Lines
PODs K&N RU-600s W/PCV
PCS XXX/2 cams
Jetted & PMS Tweaked 20.0/152.5 3.0 turns
Wimmer Machine Custom Oil Cooler & Stash Tube
Dyna 3000 Step 5/ 6500 redline
6" Fwd Control Extension W/Boards F&R
Memphis Shades Bullet Fairing
Progressive 465 rear
Progressive Springs and GVE front
10,000 Monkeys throwing crap at the glass and this one thinks he's Picasso...