Cane Creek AER Aluminum 45/45 Headset Angular Contact Sealed Bearing 41.8mm x 30.15mm x 6.5mm
$ 11.99 $ 27.99
This is one 45/45 headset bearing. This bearing will work with many bikes that have integrated headtubes. It has an OD of 41.8mm, and ID of 30.15mm and thickness is 6.5mm. This bearing has an anodized aluminum outer ring that makes it lighter than most headset bearings at about 14g. This is one bearing, if you need a pair, buy 2!
Be sure to measure your old bearing to assure that this will fit. The appearance of this part may vary slightly from the photo.