Hey Dude I am currently running a Czar 1100 wheelbase with echo 160 cranks using a 17t cog, i am 6'5" tall and am mostly legs, i find them to be great, you seem to have a better balance if your feet are closer together. I find large gaps and up's the same as i used to when i had 175s will proberly try a longer crank when these give up or then again. hope this helps