Is 14mm enough?

Just got some Savage tires. They are Bandlands mounted on Traxxas 5 star wheels. Problem is, I have to buy new hex's and wheel nuts for them. Question is: is 14mm enough? I plan to run a 5s-6s Savage with a plane esc. For now a 8xl copy motor, maybe a Medusa down the line. Will these do the job? I heard of using the "grub screw mod" but I don't see anyway to drill through them...

Looking for what your take is on 14mm. I read a thread a couple of days ago of a guy that couldn't run his car without stripping his. Then again, he was running NiMh, on a fairly heavy/powerful setup I would assume...