Ultegra 6800
I did think about going up to ultegra, but don't know if there is much of a benefit over 105. Plus the clearance for the brake calipers on 105 allows me to fit 28s, and I think for Ultegra it's up to 25s. I could be wrong.
@Thrust started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
Ultegra 6800