what are the biggest tires u are able to run on a stock trx4 1500? debating on 33 or 35 's.

 

i know 35's wont fit, 34's wouldnt even fit on my 2500 trx4

 

That is on your 2500.
34's will fit on a 1500 TRX4, 35's will rub at lock and dips

 

I installed 285/70/17 BFG AT's on my 09' TRX off-road after the factory tires woreout, they measure 32.8" and have plenty of room.

I think a 295/70/17 which measures roughly 33.3" would be able to fit easily without rubbing. Nitto AT grappler and Trail grappler, Toyo MT, and Cooper STT come in that size.

You may be able to get a 285/75/17 at is 34" to fit as well without rubbing due to it being a bitter narrower than a 70 series tire. Toyo makes that in the open country AT & MT.