approximately 6 hrs to do. did it at wyotech so there was a lot of goofing around and people just standing there watching me and a buddy do it lol. plus we "must" have 30min breaks twice a day in the class i'm in, dunno who's idea that is, and it kills your momentum lol. i don't really go offroad everyday or anything so just got yoko's geolander at/s 31's. everything i read had good tread life and good traction so it works great for me.