출처: bikerumor.com
PBR – Push Button (Lockout) with Rebound. They use sealed cartridge damping, keeping the air and oil separate, which is what Fox has just done with their new FIT cartridge.
XLR – New model with Rockshox X-Loc hydraulic remote lockout (X-Loc and Rebound). Introduces blowoff on their lockout design. Previous Cannondale lockouts were totally locked. New design builds in a blowoff that will bypass the non-adjustable threshold externally. The amount of force required to blowoff is internally adjustable. The Floodgate knob on the remote is used to set the blowoff on Rockshox’s forks. With the Lefty, though, it’s non-functioning and is just used to remove air. Cannondale is working with Rockshox to create one without the barrel to shave a few grams.
Speed Carbon w/ XLR – 1250gSpeed Carbon w/ PBR – 1194g
Speed w/ XLR – 1394g
Speed w/PBR – 1334g
2011_Cannondale_Lefty_Manual.pdf