Our Cross Clamps mount to your seattube to make your top-routed cables compatible with bottom-pull road derailleurs. Whaa? Well, you wanna race cross, right? But cross frames have top-routed cables, requiring a top-pull front derailleur. All the good, light components tend to be coopted from road groups, which have bottom-pull-only derailleurs. Lots of cross frames have a mount for a pulley already integratedthe Cross Clamp allows you to do this with any frame. Get it?