Weight: 288 g.

The SRAM XX Disc Brake uses an all-new, two-piece forged magnesium caliper for greater stiffness and performance in a lighter-weight package. Oversized pistons give you more stopping power with less lever pull for easy one-finger braking. Super light XX carbon fiber lever blade, two-piece rotor construction, titanium hardware, pad contact and reach adjustments.

Weight: 395 g. (Front or Rear)

This lightweight, two-piston system features on-the-fly adjustment with Avid’s Speed Dial pad contact point adjustment. Drip-free bleeding helps prevent fluid leakage. Tri-Align CPS mount allows easy set-up and installation. Ambidextrous levers can be used on the right or left side. 160mm Clean-Sweep Serpentine rotor. Uses DOT 4 or 5.1 fluid.

Weight: 395 g. (Front or Rear)

This top-of-the-line hydraulic disc brake from Avid delivers all of the features of the popular Juicy Seven along with new carbon levers and reservoir cap. 160mm Clean-Sweep Serpentine rotor. 395g. Front or rear.

Weight: 416 g. (Front or Rear)

Unbelievable stopping power! These build on the Juicy brake line and add new technology. A sleek, newly re-designed caliper, plus carbon fiber lever blades, help keep the weight down. Tool-free pad contact point and lever reach adjustments. More powerful than Juicy, but with better modulation. "Top-loading" design makes brake pad changes a snap. Refined G3 series rotor (fits standard 6-bolt type hubs). All calipers are 74mm type, and fit 74mm forks with no adapters needed. Adapters are included for 51mm frames/forks.

Weight: 316g. w/rotor (Front or Rear)

Features
Hydraulic Disc Brake for International A-type
Stiffer mono-block caliper body
Maintains current hardware and pad
160, 180 and 203mm rotors available

Weight: 230 g. (Front)

Shimano's new disc brake calipers retain Shimano's signature control through superior modulation. The BR-M975 retains an opposed two-piston design while reducing weight: The one-piece design is more compact and very stiff which results in a precise and efficient disc brake design. The titanium back plate on the new XTR brake pads are 12 grams lighter than current steel pads. Durability in the pad is also improved by 50%. Post mount design for Manitou Forks.

Weight: 217 g. (Front or Rear)

Shimano's new disc brake calipers retain Shimano's signature control through superior modulation. The BR-M975 retains an opposed two-piston design while reducing weight: The one-piece design is more compact and very stiff which results in a precise and efficient disc brake design. The titanium back plate on the new XTR brake pads are 12 grams lighter than current steel pads. Durability in the pad is also improved by 50%. Use intarnational standard calipers for the ultimate in weight savings to achive the following rotor choices: 160mm / 180mm for the front or 160mm / 140mm for the rear.

Weight: 200 g. (Front or Rear)

Features
Super light-weight
152g lighter (compared to previous model)
Proven performance of Shimano's super Linear Response system
Cartridge shoe holder

Weight: 200 g. (Front or Rear)

Receiving upgraded cosmetics, BR-M970 answers the calls for single speeders and traditional alike. Parellel-Push Linkage: The parallel mechanism employed produces uniform pressure on the rim for even pad wear, maximum tire clearance and optimum braking control.