SRAM S-300 1.1 Courier Crankset - 170mm, Single Speed, 48t, 130 BCD, GXP Spindle Interface, Black 

Crank arms are forged aluminum, use the same bottom bracket interface as high end models.

AL-6061 forged arms, AL-7075 ring
Includes English threaded GXP cup and bearing set
Model: S-300 1.1 Crankset
Brand: SRAM
QBP #: CK3301 
Manufacturer Part Number: 00.6118.121.001
UPC: 710845729829

Number of Chainrings: Single
Color: Black
Crank Length (mm): 170
Chainline/Hub Compatibility: 130 Hubs , 135/142 Road Disc Hubs > 415 mm Chainstay
Pedal Spindle: 9/16"
Crank Intended Use: Road
Rings: 48
Spindle Interface Type: SRAM/Truvativ GXP
Drivetrain Speeds: Single Speed 3/32"
Defined Color: Black
Chainring BCD: 130
BB Included: Yes