Mudbugs in 26x12x12 have the most open/wide lugged tread from their lineup.They also are the lightest tire out in that tread pattern(even 589 and mudlites)I wasnt aware that they redesigned the 27 and 28 bug tread pattern to cut down on weight.My 28s lugs are 1" shorter in length and almost 1" skinnier across,they also added alot more of them around the tire(not as open of a tread),I noticed they get caked up faster and dont clean out as good as the 26x12x12 i had before...THIS IS ALL MY OPINOIN AND I FIGURED TO BRING THIS UP TO EVERYONE,JUST INCASE SOMETHING LOOKED DIFF BUT YOU COULDNT PINPOINT IT..IT DROVE ME CRAZY UNTILL I FOUND IT OUT>>> STILL A GREAT TIRE!!!!