The main cogset of the OG 1090 cassette is machined out of a single forged form that is heat treated and then shaped in a complex series of CNC-guided operations. Weight, stiffness, and strength-wise, the OG 1090 Cassette delivers titanium’s weight with solid steel’s superior strength and stiffness.

• Lightweight: Innovative CNC‘d chromoly steel construction.
• Durable: 35% harder than titanium!
• Stiff: 15% stronger than its competitor.
• OpenGlide technology allows for smoother transition between gears.
• Weight 155g / 11-23, 166g / 11-26
• Speeds 10
• Recommended Chain PC 1091R, PC 1091, PC 1071
• Lock Ring Material Aluminum Anodized
• Sprocket Material Heat-Treated Steel
• Recommended Group SRAM Red