Spank changed things up a bit a few years ago when they offered foam filled handlebars aimed at reducing vibration. They quickly built up a following of riders who were very happy with the technology. With time they decided to try it in rims. The Vibracore 350 has a unique profile with low sectional height & wide width which aides radial compliance & lateral stiffness. Improved radial compliance for better traction over bumps & chatter while reducing negative feedback to the rider gives enhanced performance & comfort. Pick your favorite hubs and we can lace a set up for you!