Petroworks sells wider flares, as does Calmini. Trailtough and Rocky Road Outfitters sell the wider Bushwhacker YJ flares. The ones from Calmini or Petroworks might work the best for 31-10.50s as both sets are fairly narrow yet wider than stock. If you have a rust issue where the flares mount, get the Calmini flares, they attach using rivets.