From the comparison videos the knock off ones are not robustly made, the grit (for want of a better word) wears out pretty rapidly. Also the Horl ones have the further levels of refinement, up to the Kagami stones which are ridiculously fine.
What one do you have/what’s your setup after a while of use?
@Tenderloin 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.
From the comparison videos the knock off ones are not robustly made, the grit (for want of a better word) wears out pretty rapidly. Also the Horl ones have the further levels of refinement, up to the Kagami stones which are ridiculously fine.