Needing to replace my 2007 883XL tires. Wondering how big of tires I can use safely and also any recommendations on a good tire for front and rear?

 

This should help.

I used the stock Dunlops for a while, some people like to **** on them, I think they're fine tires. I switched to Avon Speedmaster and Safety Mileage but that's just me.

 

I recently changed to Metzeler me888's and LOVE LOVE LOVE them!
Smoother riding, handle better and don't follow the tar snakes like the old stock Dunflops did.

 

I've used the michelin commander II on 2 different Sportsters and had good luck with them. My newest used Sportster came with a Metzeler ME880 Marathon and so far that seems to be a decent tire too.