15-Tooth MEGAPULLEY: 15-tooth pulley on the rear derailleur reduces noise, chain friction and lasts longer. (Nexave C900 / C600 / C500 / C050)

9-Speed HG sprockets: Chamfered shift ramps and special tooth profiles get maximum shifting performance out of the narrow 9-speed chains.

9-Speed RAPIDFIRE: Short-throw shifting action makes changing gears fast and east under and condition. (XTR / XT / LX / Deore)

Cartridge Bearing Headset: Installs easily and compensates for frame head tubes that haven't been milled parallel.

Cartridge Bottom Bracket: One-piece cassette bearing bottom bracket helps keep out mud, dirt and water.

Center-Lock System: The rotor mounts to the hub quickly through a spline and lock ring mechanism. This feature is sure to be popular with racers when packing and traveling with their bikes and with mechanics who won't be dealing with stripped out or broken mounting bolts.

CI-DECK: CI (Central Information) Deck provides a large easy-to-read display of front and rear derailleur positions. (C201/C101/C050)

Disc Brakes: Usually using a hydraulic medium, this type of brake is strong and has a high level of controllable stopping power with less fade. 2 & 4-finger levers provide for an easy grip.

Double Servo Panta Mechanism: Keeps rear derailleur guide pulley a uniform and constant distance from each sprocket.

Dual Control Lever: For mountain bikes, the dual control shift lever sets a new standard for shifting ease and flexibility. It lets you shift gears up or down, regardless of your hand position or the handlebar.

DUAL SIS: Indexed shifting for front and rear derailleur.

Front Hub Roller Brake Modulator: Roller brake compatible front hub features a built-in braking power modulator that prevents excessive brake pressure. (Nexave C500 / T400 / T300 / Nexus).

HG Sprockets: Shift ramps and tooth profiles provide superior chain control for fast and precise rear derailleur shifting.

HOLLOWTECH II Crankset: Integrated bottom bracket and crankset design reduces the number of parts, significantly cuts down weight and increases rigidity. Hollowtech II designs allow the bottom bracket bearings to be spaced more widely. This dramatically changes the loads on the bearings to increase rigidity and bearing service life.

Integrated POWER MODULATOR: V-Brake lever features a built-in braking power modulator that absorbs excess lever pressure to prevent inadvertent wheel lock-up. (Nexave C900 / C600)

Light Alloy Sprocket Carrier: Supports the sprockets near their outer perimeter to reduce weight and increased stiffness for improved shifting response.

Linear Action Rear Derailleur: Cable friction is reduced through the use of a direct cable guide channel and ball bearing guide pulley that eliminate the need for an outer casing. (Nexave C900/C600/C500)

LINKGLIDE Sprocket: Since the bi-directional gear shifting in changing up and down is quite smooth and the shock to be very little, delightful riding is realized.

MEGA-9 Sprockets: Wide-range 9-speed sprocket cluster with close-ratio gearing.

MegaRange sprockets feature a super low 34-tooth gear that makes it easier to climb steep hills. (Nexave C900 / C600 / T400 / T300 / C201 / C101 / C050 / C030)

Mono-Body Caliper: The dual piston is a forged one-piece "mono-body" design that eliminates the need for heavy assembly bolts that reduces weight and increases rigidity.Mono-Body Caliper: The dual piston is a forged one-piece "mono-body" design that eliminates the need for heavy assembly bolts that reduces weight and increases rigidity.

Octalink: Eight splines on the oversized hollow bottom bracket spindle mate with the crank arm to form a stronger more rigid interface.

Optical Gear Display: At-a-glance gear position indicator.

Parallel-push linkage: Keeps brake pads parallel with rim to lesson shoe dive-in, improve braking response and maintain uniform pad wear. (XTR / XT / LX)

Pre-Select Mechanism: Allows desired gear to be selected before pedaling. Also takes up excess cable pressure to prevent damage to the derailleur. . (Nexave C900 / C600 / T400 / T300 / C201 / C101 / C050)

RAPID RISE Rear Derailleur: Extension coils spring put the derailleur in the low gear direction for easier down-shifting.

Rear SIS: Precise indexed shifting of rear derailleur.

Revoshift: Derailleurs are shifted by rotating a collar on the bar grip. (C201 / C101 / C050 / Nexus)

Roller Clutch Freehub: Roller and ramp mechanisms are used instead of conventional pawls and ratchet wheels. Provides for faster engagement and silent freewheeling. (Nexave T400 / T300)

Shimano Hyperdrive: Integrated design of SGX chainrings, chain, and front derailleur to deliver precise and dependable shifting action.

Shimano M-System: Special pad formulation maintains braking power in wet environments.

Smartcage: 15-tooth tensioning pulley and 13T guide pulley shorten the rear derailleur pulley cage for more ground clearance. Pulleys last longer and the chain runs more quietly.

SPCM (Shimano Power Change Mechanism): Front derailleur shifting effort is significantly reduced because the derailleur is moved by energy from the spinning crank. (Nexave C900 / C600).

SPD (Shimano Pedaling Dynamics): SPD is an integrated shoe and pedal system that provides the pedaling performance of cleated cycling shoes along with the ability to walk safely and comfortably off the bike.

SPD-R: Racing shoe and pedal system engineered to improve pedaling stability and efficiency.

SPD-SL: SPD-SL uses a large a low profile cleat and binding mechanism that creates a highly stable interface between the shoe and pedal in a super lightweight design

STI Dual Control Lever: Allows shifting and braking from a single lever without taking hands off the bars. (Road)

Tap-Fire shifters feature a low-effort push-button and lever action that makes derailleur shifting amazingly easy. (Nexave C900 / C600 / C500 / T400 / T300)

Top Swing front derailleur: Simple linkage reduces friction to reduce shifting efforts.

V-Brake & Servo Wave Lever Action Lever Action: Awesome stopping power under fingertip control. Servo Wave lever action delivers quicker response and enhanced control.

V-Brake Power Modulator: V-Brake features a power modulator that absorbs excess lever pressure to make braking easier to control. (T605 / T400 / T300)