ATV Wheels & Tires GBC Grim Reaper or Maxxis Bighorn Tire October 17, 2015 Any opinions on GBC Grim Reaper or Maxxis Bighorn tires for my 2015 Polaris Sportsman 850 on aftermarket ITP SS312 wheels. I ride mostly gravel roads, trails and some mud. Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related