RACEWORK XT Hollowtech Mtb Crank Arms For Bicycle Crankset Integrated Candle Pe 2 Crowns Mountain Bike Connecting Rods 104 Bcd. Model: XT Product name:Hollow integrated crank Colour: Shiny black Material: Aluminum Alloy 6061-T6 Number of teeth: 9-11 speed compatible Suitable for: mountain bike Crank length:170/175MM Number of teeth: 32/34/36/38/40/42T Weight:About 653g(Only crank) Process: One-piece forging, anode sandblasting? The size is measured manually. Please refer to the actual situation. ·If you need to have no bottom bracket, please select the option "no BB 32-38T", and then note or contact customer service for the number of teeth you need, thank you.