Pro-One 39mm Triple Tree Pro-One Triple Tree are built out of solid Billet Aluminum built to last making upgrading a no brainer. Machined cut out for clean cable wiring for less headaches. Features: CNC-machined out of solid 6061-T6 aluminum Increased clamping area of 0.25 on the bottom tree reduces lateral and torsional fork flex, which increases the rigidity and stability of the front end Machined cut-out in top tree for clean cable and wire routing No fork lock capabilities Will fit most 39 mm front ends with 7 O.c. forks Designed to accept standard risers (3-1/2 O.c.) Models with risers cast into the upper triple tree will require separate purchase of risers, bushings and mounting hardware