I got a new set of XT cranks..(the fatter Octolink model) so I think I am alright...Mikey said:73 BB shell width is correct for Fisher bikes. But the spindle length (113 in your case) depends on what model crank you have. Since you've got an ES71 BB, I assume you have an XT or an LX crank. 113 is correct if it's an XT or older LX. Newer LX cranks (with either the 2002 or 2003 model year, I forget which) need a longer spindle.