SLX was born out of the separation of the old LX groupset into LX for Trekking bikes, and SLX for a true mountain bike specific groupset that is Tough, Aggressive and Light.

The Hollowtech II SLX crankset features a composite middle ring for double the service life, improved shifting performance, and a reinforced construction for a rugged riding style.

Featuring hollow forged crank arms, durable pipe billet steel axles, and smooth shifting SG-X chainrings, the SLX Crankset will take your riding to new heights.

Features:

• Composite middle chainring offers double service life, improved shifting and smoother pedaling
• 2 tone colored crank arm
• High rigidity crank arm
• Accurate chainline construction by 2-piece structure
• Reinforced construction for extreme riding style
• Increased ground clearance

Specifications:

• Model Number: FC-M660
• Series: SLX
• Crank Construction: HOLLOWTECH II
• Cassette Compatibility: 10-speed
• Chain Compatibility: Super Narrow HG for 9-speed
• 4-Arm Chainrings: Yes
• Chainring Sizes: 42-32-24T
• Bolt Circle Diameter: 104/64mm
• Crank Arm Length: 170mm or 175mm (choose from drop-down menu)
• Crank Arms: forged aluminium / hollow type
• Outer Chainring: aluminium
• Middle Chainring: steel + composite (32T)
• Inner Chainring: steel
• Chainring Bolts & Nuts: aluminium (bolt), steel (nut)
• Bottom Bracket: included
• Chain Line: 50mm
• BB Shell Width: 68/73mm
• Weight: 889g including BB (42T)
• Made in Japan