• Nukeproof Neutron Bottom Headset Cup


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  • Nukeproof Neutron Bottom Headset Cup

    Nukeproof's Neutron Bottom Headset Cup is now available as both separate top and bottom cups, so you can choose the option that you need. 


    The cups will allow you to replace only the bearings with the Nukeproof Steel Bearing or the upgraded Nukeproof Ti coated bearing with stainless balls. Precision-engineered to the most exacting of tolerances to deliver optimum performance and long life in harsh riding conditions.

    The latest generation of headsets has been revised, improved and expanded for optimum fit, sealing and performance as well as compatibility with a wide range of fork and frame standards. Featuring sealed angular contact bearings, split alloy crown races and upper and lower bearing cups CNC-machined from proprietary aluminium, the headset offers the optimum balance of lightweight, strength and durability for performance across all riding disciplines.

    The headset is available in a range of options to cover multiple fork/headtube configurations, including a full range of Standard Steerer (SS – 1-1/8') and Tapered Steerer (TS – 1-1/8' to 1.5') combinations. Internal and external cup options also available including zero-stack versions with internal top and bottom cups.

    All models feature a super tough black hard anodised finish, with laser-etched graphics.

    Don't know which headset you need? No problem! Simply use our Headset Technical Guide which includes a Headset Finder.


    • Specific Bottom Headset cup
    • Replaceable angular contact bearings
    • Laser-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

    Buy Nukeproof Components from Chain Reaction Cycles, the World's Largest Online Bike Store.


    • Colour: Black
    • Option: EX49-40 - B7, ZS56-40 - B8, EX44-40 - B5, ZS49-30 - B6, EX44-30 - B4, EX34-30 - B1
    • Steerer Diameter: 1.5", 1.1/8"
    • Headset Type: Conventional, Semi-Integrated



  • Save Up To 70%
    RRP $32.99
    $9.99 - $19.99 9.99 19.99
    Select Colour
    Select Option
    EX34-30 - B1
    EX44-30 - B4
    EX44-40 - B5
    EX49-40 - B7
    ZS49-30 - B6
    ZS56-40 - B8
    Select Steerer Diameter
    Email me when in stock

    Order in the next


    and choose Next Day Delivery at the checkout

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