Hammer TH-877

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12mm "Deep Cup" design Nylon top cover Forged and CNC machined steel cups 5/32" x 20 upper bearings 3/16" x 20 oversized lower bearings 24.7mm stack height 149g Specifications Bear ing Grade: Heavy duty caged ball Crown Race Diameter: 30mm Lower Cup: 34mm Headset Type: External, Threadless Upper Cup: 34mm Headset Weight: 149g Primary Color: Black S.H.I.S.: EC34/28.6 | EC34/30 Steerer Tube: 1-1/8'' Stack Height: 24.7 Special order - ships in 5-10 days from our distributor. Show more