Chris King DropSet 3 Headset - 1-1/8 - 1.5" 41/52mm 36 Deg Matte Black MFPN=101308 The Shimano Tiagra SL-4600 offers

The Shimano Tiagra SL-4600 offers Rapidfire Plus shifting with 10-speed road drivetrain compatibility

Includes the lockable set screw replaceable insert and ultimate aerodynamic fit

Tough AL-6061 T-6 aluminum construction

New bump rubber in combination with the cup it sits in acts as a second spring loading and releasing energy to ensure the rider returns back into position after a heavy compression in a quick controlled manner (Coil spring sold separately)

Chris King DropSet 3 Headset - 1-1/8 - 1.5" 41/52mm 36 Deg Matte Black MFPN=101308 The Shimano Tiagra SL-4600 offersThe DropSet 3 Headset features the GripLock bearing cap that preloads the headset independently of clamping onto the steerer so it retains preload far better than other headset designs. The DropSet 3 is impervious to the ill effects of load spikes from large hits and heavy braking. This means smoother steering no more creaking and a longer lasting headset. GripLock design also takes the guesswork out of preloading a headset because the bearing preload