they are heavy, and they do measure around 26.5, if you have power to turn them they are a great tire. you dont have any power mods listed so i am gessing you do not have any but you should turn them ok. when i bought my executioners i upgraded from 26" 589's and i could putt around places with my executioners where my 589 would be spinning. they may look almost the same but i think the performence is alot different, but that is just my two cents.
-Aaron