This is the SRAM Red Crankset, Crank Spindle Diameter 24/22mm.

Features:

• Material: Exogram hollow carbon fiber arms
• Chain Compatibility: 11-speed
• Pedal Spindle: 9/16''
• Bottom Bracket: Not included
• SRAM Model ID: FC-RED-C2

Product Specifications:

• Speeds    11
• BB Compatibility    BB30/PF30-68mm, BB30A, BB386, BBRight, GXP/PF GXP 68mm
• Teeth    36/52T 34/50T
• Crank arm length    170mm, 172.5mm, 175mm
• Chainline    45.5mm
• BB Spindle Interface    30mm, GXP
• Chainring material    Aluminum/Aluminum
• Bolt Circle Diameter (BCD)    110 BCD, 130 BCD
• Chain Technology    11 Speed Powerchain
• Drivetrain Configuration    2x
• Technology (FD)    Road-Yaw
• Front Tooth Jump    10, 13, 14, 16

Vendor Item No:

• 00.6118.383.002 (Crank Arm Length 170mm, 36/52T)
• 00.6118.383.003 (Crank Arm Length 172.5mm, 36/52T)
• 00.6118.384.002 (Crank Arm Length 170mm, 34/50T)
• 00.6118.384.003 (Crank Arm Length 172.5mm, 34/50T)
• 00.6118.384.004 (Crank Arm Length 175mm, 34/50T)