10" wide wheels are not recommended if you go off-road and air your tires down much. It takes more air pressure to hold the tire beads against edges 10" apart than when they are 8" apart.
In other words it would be more likely for that size tire to come unseated from a 15x10 wheel when aired down while offroading than it would on a 15x8 wheel.
15x8 wheels ars far more popular for 33 or 35x12.5" tires for that reason.