It works with Hollowtech II and 2 piece cranks

10-44 GS/SGS Derailleur (Wolf Tooth GCX44)

Length: 65mm

FXB Blue: High light transmission while reducing the full spectrum of glare

Mountainflow Eco-Wax Wet Lube - 120ml PDP|Option It works with Hollowtech IIJust because you're going to get gnarly doesn't mean that your drivetrain has to. This medium density oil provides excellent, long lasting lubrication. Significantly reduces drive train friction for a nice smooth ride. Features: Plant Based and Biodegradable 0% Petroleum (Most chain lube is made from petroleum) Fast + Smooth Riding Conditions: Moderate to Wet Even the bottle is eco friendly! It is made from 100% Post Consumer Recycled plastic.