11 450 rear tire help

I'm about to get some new tires and was wondering what everyones opinion is on running the 110/90-19 vs. the 120/80-19. Which do you prefer and why?

Thanks

My 2011 450SX-F came with a 110. The 120 I put on rubs the exhaust muffler slightly and the 110 didn't. I ride Nevada desert and often use every bit of suspension travel. I'm having mine resprung right now so maybe that will solve the problem?

Did it affect the handling or traction with the 120?

Honestly I'm not sure that I could tell there was a huge difference but I did seem to get a little more power to the ground.

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