SD Boundary Tapered Headset

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The SD Boundary is a tapered headset for frames with a 1.5" lower and 1 1/8" upper head tube, running a standard 1 1/8" steerer up top.It uses precision sealed bearings to keep wat er and grit out of the steering. A star nut and alloy top cap are included, so you have what you need to set it up. Show more