CeramicSpeed BB ALPHA Bottom Bracket - PF30 73mm For SRAM DUB Spindle MTB BLK MFPN=09-001250 The AR40 is designed for

The AR40 is designed for use with only tubeless tires greater than 28 mm wide Rim Width (Internal) 25 Front Axle 12mm Thru x 100mm Valve Presta Color Black Wheel Size 700c Defined Color Black ISO Diameter 622 / Road / 29" Tire Type Tubeless Ready Rim Material Carbon Hub/Brake Compatibility Center-Lock Disc

Headlight mount easily on different diameters and shapes with wildly adjustable silicone strap

5mm end section to resist damage and deformation caused by heavy grinding and spinning into/out of grinds CNC weight saving detail on base Sold as single

Why have extra steerer tube requiring spacers on top of your stem you ask

CeramicSpeed BB ALPHA Bottom Bracket - PF30 73mm For SRAM DUB Spindle MTB BLK MFPN=09-001250 The AR40 is designed forA bottom bracket built to outlast your frame BB ALPHA features hardened stainless steel races hand built with grade 3 Silicon Nitride ceramic balls custom engineered seals and precision dust covers delivering up to 500% better moisture protection while still providing ultra low friction performance. The simplified spacer tube design and lighter 7075 aluminum cups ensure quick installation and a 10% weight reduction over previous generations. All