New Ultimate's seat mast top piece is one of the lightest available. In fact, this design saves an astounding 50 grams over most other manufacturers' aluminum toppers. The saddle rail clamp mechanism is identical to those used on New Ultimate's setback carbon seatposts, using a combination of titanium bolts and machined aluminum pieces. The central tube is manufactured from high modulus carbon with an attractive 3k weave finish.
New Ultimate's ISP topper is compatible with Guru's Photon frame set, and any other frame that uses a round 30.0 mm seat mast. The available extension adjustment is limited to 9 mm.