Cane Creek 50-Series Headset IS41/28.6|IS52/40 Black MFPN=101365 but they don't have to

but they don't have to be

Includes one16g cartridge

Full length zippered closure

6 Travel (mm) 180 Steerer Tube Length (mm) 248 Weight 2000 Stanchion Diameter 37 Axle to Crown Length 574 Crown Race 40 Front Axle 15mm Thru x 110mm Maximum Tire Width 74 Brake Type Post Mount 180

Cane Creek 50-Series Headset IS41/28.6|IS52/40 Black MFPN=101365 but they don't have toAdditional machining on the cups, but incorporating all the features of the 40 Series headset while offering the perfect balance of performance and value Machined, bevel and relieved 6061 T6 aluminum for minimized weight and maximized strength with ZN40 sealed cartridge bearings Compatible with Cane Creek Interlok spacers and traditional spacers. Spacers sold separately TECH SPECS