The Shimano Ultegra FC-R8100 is a 2x12-speed Hollowtech II road crankset, available in 52/36T (165 mm or 170 mm) and 50/34T (170 mm).

• 2x12-speed for Shimano Ultegra R8100 series
• Chainring options: 52/36T or 50/34T
• Crank lengths available here: 165 mm and 170 mm
• Hollowtech II 24 mm spindle; 110 mm BCD
• Q-factor 148 mm, chainline 44.5 mm
• Approx. 711 g (170 mm, 52/36T); bottom bracket sold separately