Has anyone tried to put 33" tires on the 09 TRX4 with the factory suspension? just wanted to know if they would fit without rubbing, Thanks

 

Stock 20" rubber is 33" and just about 11" wide. 275/60/20
Certainly no issue's on fitment.
TRX4 just sits a little higher.
The only issue would be going to a wider tire.

Check THIS sticky out for more info. 3rd Gen fitment is nearly identical to 4th Gen fitment. There's only 2mm's difference between the years.

 

Got 285/70/17 (32.8') BFG AT's on mine no problem. I have more than enough room. I think I could go 34' actually with the room I have.