Jenson USA (2008)

Like the name says - designed to be the ultimate hydraulic disc brake. Light, high-performance, and with cool features like a carbon lever blade, there isn't much else you could ask for. The caliper bodies are a forged, one-piece monoblok design and use Avid's Tri-Align caliper positioning system for simple setup.
Where's the knob?
This brake does away with the large contact point adjustment knob you've seen on other Juicy brakes ( a weight-saving concession). Instead, you simply use a 2.5mm hex key (which also adjusts rebound on some Rockshox forks). Handy and saves weight and space in your tool kit.
Features:
- Caliper fits 51mm International Standard frames/forks as indicated
- Claimed 345 grams (Front, post-mount, 160mm)V bolt rotor fits today's common International Standard hubs
- Magnesium lever bodies with carbon blade, ambidextrous design, compatible with the SRAM Matchmaker add-on clamp (not required or included, but a nice add-on)
- New Avid organic compound pad
- Weight-saving titanium mounting bolts and banjo bolts
HuckNRoll.com

The Avid Juicy Ultimate Disc Brake truly earns its name with a sleek, sexy, and feather-light design. Avid used magnesium and carbon fiber for the lever body and blade, respectively, reducing weight and improving your bike’s steering feel. The Monoblok calipers help the whole system feel stiff and responsive.