Sinz Integrated Headset V2 Head Tube Size:1 1/8 to 1 Step-Down It's the Profile 3/8 Volcano

It's the Profile 3/8 Volcano Washer

pinned joint construction intended for dirt jump

5in at J&R Bicycles are constructed of premium 6065 aluminum alloy which is also referred to as T-6 Aircraft Aluminum

2mm options

stainless fork race

Sinz Integrated Headset V2 Head Tube Size:1 1/8 to 1 Step-Down It's the Profile 3/8 VolcanoThe Sinz Integrated Headset V2 is designed for frames with integrated head tube for integrated headsets. Includes sealed cartridge roller bearings, stainless fork race, star nut, headset bolt, and etched alloy top cap. PRODUCT WEIGHT: 1" = 3. 2 ounces 91 grams 1 1 8" = 3. 2 ounces 91 grams AVAILABLE SIZES: 1 1 8" to 1" Step Down (for frames with 1 1 8" integrated headtube using a 1" fork) 1 1 8" Integrated COLOR OPTIONS: BLACK WHITE RED BLUE