nah you can definetly ride a normal board with size 11 feet. i have 2 friends with size 13's and they ride normal boards with no problems. they have never hung up on their toes or anything and dont even ride very extreme angles. with size 11's you have nothin to worry about in terms of the board. with size 11's you will need a large binding and it will fit your board fine, just make sure you center your feet so your toes and heels hang over the edge evenly.