Chris King started making headsets in 1976 and has been refining them ever since. Their DropSet is built to be precise and dependable and sets the standard for quality integrated headset function delivering precision performance that is built on the same pedigree of Chris King headsets from the past 40 years.
The Dropset comes in 4 versions; Dropset 2, 3 & 4 (which you can purchase on this page) and Dropset 5 available here. All are available in steel or ceramic bearings with most colors and sizes in stock at all times.
Here are the specific headset bearing sizes of each one:
DropSet 2: IS42/28.6 45/45 degree Upper Bearing, IS52/40 45/45 degree Lower Bearing. Fits OPEN, Trek, Cervelo and many other major brands).
DropSet 3: IS41/28.6 45/45 degree Upper Bearing, IS52/40 36/45 degree Lower Bearing (for forks with a 36/45 degree crown race). Fits many Santa Cruz, Yeti, Alchemy, IBIS and other brands.
DropSet 4: 42mm/42mm 45/45 degree Integrated Headset (fits some BMX frames and most Ritchey Steel framesets).
DropSet 5: IS42/28.6 45/45 degree Upper Bearing, IS52/40 45/45 degree Lower Bearing with a specific bearing cap to fit current year Specialized frames ONLY. please refer to this doc to check sizing.
DropSet 1: IS41/28.6 45/45 degree Upper Bearing, IS52/40 45/45 degree Lower Bearing (fits many Santa Cruz, Yeti, Alchemy, IBIS). ** No longer in production and replaced by DropSet 3 **
If in doubt, please contact us to check which headset you need for your bike.