Joined: Jul 2002
Posts: 40,863
Likes: 3,115
From: Sacramento, California, USA
Bikes: Specialized Tarmac, Canyon Exceed, Specialized Transition, Ellsworth Roots, Ridley Excalibur
Perfect chainline is only an issue with 1x1 bikes like fixed gears. You can get either the 118 or 122. You may have to adjust the limit screws on your FD so that you don't throw the chain off, but that's not a big deal.