the michelin city tires are 8mm thick, and the soma everwears are 5 mm thick. i haven't ridden the michelin yet, but i have been on the everwear for about 2 months (with constant skidding- its squared off but still has plenty of rubber left.). i wore out an armadillo in a little over a week. i will probably try the michelins next time i need a new rear tire.