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Wolf Tooth Premium Integrated Standard Headset For Specialized


The Wolf Tooth Premium IS Headsets for Specialized are made exclusively for Specialized frames with moulded-in internal bearing cups and a 42mm upper bearing diameter... Read more

IS42 Upper - 3mm StackIS42 Upper - 3mm Stack


The Wolf Tooth Premium IS Headsets for Specialized are made exclusively for Specialized frames with moulded-in internal bearing cups and a 42mm upper bearing diameter.

Machined at Wolf Tooth’s Minnesota shop with aircraft-grade 6061 aluminium and with three levels of industry leading custom sealing, these headsets are designed to be lightweight, strong and durable. 

The headsets use Enduro stainless steel bearings which are built to the highest specifications for lasting quality.

The stack on the headsets is 3mm and is available in Wolf Tooth’s signature anodised colours.

Key Features

  • IS (Integrated Standard) headset for any Specialized bike that uses a 42mm upper bearing
  • Uppers and lowers sold separately
  • Enduro stainless stell bearings in upper and lower
  • Lifetime warranty
  • Weight: 43g (3mm)
  • Material: 6061 aluminium
  • Stem cap torque spec: 2–3Nm with light grease on threads only
  • Made in the USA

Upper Assembly Features

  • Ultralight Stem Cap with 5mm Integrated Spacer plus an aluminium bolt and a star nut
  • One 3mm stack height top cover option
  • O-ring seal prevents water intrusion around steerer tube
  • Custom-moulded upper lip seal provides additional protection for upper bearing

Known Compatible Specialized Models

Aluminium Mountain Bikes (all except Chisel HT aluminium)
Camber Carbon (2014)
Chisel Alloy HT (Smartweld HT) (2017-2021)
Enduro 29 Carbon (2014)
Enduro Carbon (2017, 2020)
Epic Carbon (2014)

Epic FSR (2021)
Epic FSR Carbon (2018)
Epic HT (2017, 2020)

Fatboy Carbon (2015)
Fuse Carbon (2017)
Stumpjumper (2021)
Stumpjumper Carbon (2019)
Stumpjumper EVO (2021)
Stumpjumper FSR Carbon (2016)

ABOUT Wolf Tooth

Designed, prototyped and tested to withstand the harshest Minnesota conditions, each Wolf Tooth product improves the ride experience with ingenious solutions to level the playing field in the ever-evolving world of cycling technology. Whether you want to go 1x, put a dish-sized cassette on your gravel bike or add a spash of colour to your trusty steed, Wolf Tooth has you covered, whatever you ride.Read more about Wolf Tooth.


Founded by real cycling enthusiasts in 2004, our passion for elite performance runs through everything we do at Saddleback. Our team of dedicated roadies, mountain bikers and triathletes practice what we preach to bring you the finest cycling products and a superior service to match. We're the official UK home of Castelli, Chris King, ENVE, HJC, Moots Cycles, PUSH, Sidi, Silca, Sportful, Stages, Troy Lee Designs and Wolf Tooth.


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