BOR and Tune have a 2-fold Spider developed corresponding to the fastening principle of Sram XX and Co. with 120/80 bolt pattern, but one size smaller. The Spider with 104 / 64er bolt pattern allows to mount keinere chainrings, making just on a 29er sense. The chainring bolts are thereby directly screwed into a thread in the large chainring. The small chainring is mounted conventionally on threads in Spider. The 20er chainring is made specifically for this spider. It carries a laser treatment with the inscription 2x10. A matching 34er, 36er or 38er chainring is available in our shop. For increased mileage, the chainrings are blasted with glass beads, which hardens the surface and compacted.
Material: Aluminum Teeth: 20 bolt circle diameter: 64 mm Compatibility: 9-speed, 10-speed Location: indoor Color: Black