Have to say my impression is that GP4000s is faster. But not much in it.
Are they faster, or do they feel faster?
@Polka_Dot 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.
Have to say my impression is that GP4000s is faster. But not much in it.