Nukeproof Horizon Headset Cup’s

An all new range of upgraded headset’s which use the titanium coated race bearings with stainless steel balls, designed to extend life and performance.

The titanium coating is applied using “Physical Vapour Deposition” which means that the material is vapourised in a vacuum environment and then deposited on the bearing races as a composition coating. This process allows the structure, density and stoichiometry of the coating to be controlled allowing the exact attributes in our design brief to be achieved. The coating is 0.000118” thick and has a molecular bond to the bearing races so it won’t wear off or corrode. The bearing is ABEC 5 certified which means that it has passed tests which include ID and OD tolerance’s, roundness of ball, trueness of faces & surfaces aswell as noise testing at high RPM making it the perfect bearing for use in a headset.

These bearings have been designed for use in the harshest weathers and have went through various tests by the Nukeproof team during development so we are 100% confident in their performance. To back this up we are offering a 5 year warranty so if you do encounter any problems we will get you sorted.


CHOOSE THE CORRECT HEADSET: Nukeproof Headset Technical Manual

Top Cup Options Headtube Internal Diameter Steerer Weight
Black EX34-28.6 – T1 1.1/8″ Top Cap, bolt & star nut included 34mm 1 1/8″ 73g
Black EX34-28.6 – T1 1.1/8″ Top Cap, bolt & star nut included 44mm 1 1/8″ 70g
Black ZS49-28.6 – T3 1.1/8″ Top Cap, bolt & star nut included 49mm 1 1/8″ 85g


Bottom Cup Options Headtube Internal Diameter Steerer Weight
Black 1.1/8″ EX34-30 – B1 34mm 1 1/8″ 37g
Black 1.1/8″ EX44-40 – B5 44mm 1 .5″ 58g
Black 1.5″ EX49-40 – B7 49mm 1.5″ 74g
Black 1.5″ ZS56-40 – B8 56mm 1.5″ 55g


Bearing only weights

1 1/8” bearing – 18g

1.5” Bearing – 31g

TOP and BOTTOM Cup sold separately.

Bearing also available separately.



Colour:Black, Blue, Red, Purple, Grey, Copper
Option:EX49-40 - B7, ZS56-40 - B8, EX44-40 - B5, EX34-30 - B1
Steerer Diameter: 1.5", 1.1/8"
Headset Type: Conventional, Semi-Integrated


Specific Bottom Headset cup
Replaceable angular contact bearings
Lazer – etched graphics (including code)
Split Alloy Crown Race for easy installation/removal
Hard Anodised Finish
Internal and external options
Reducer crown race for 1.5" available