Wolf Tooth "MK0" MTB Headset Top Cup - IS42/28.6
- Weight : 0.03kg / 0.07lbs
- Packaging Unit: 1 Set
- Product ID (PID): 39428
- Product safety
Weight
Source: BMX Glossary
Printed: 11/05/2026
The Wolf Tooth "MK0" MTB Headset Top Cup - IS42/28.6 is the headset top cup of the Wolf Tooth MK0 line for frames with an integrated IS42 headset: the lowest stack that still carries the strength, sealing and Enduro stainless steel bearing of the Premium headsets, 4 mm tall and 44 percent lighter than the Premium top cup. The visible machine paths are the signature of the MK0 parts. An O-ring on the steerer and a lip seal over the bearing keep water out, the stem cap with hollow bolt and a star nut are included; a carbon steerer needs a compression plug instead of the star nut. Top and lower cups are sold separately, the lower is the Premium IS52/40. Not for Specialized mountain bikes and the Campagnolo Hiddenset standard. Shadow Gray, 30 g according to the manufacturer, machined in Minnesota.
Facts: Wolf Tooth "MK0" MTB Headset Top Cup - IS42/28.6
- Material: Aluminum 6061, CNC machined
- Size: 1-1/8" (28.6mm), IS42/28.6 (integrated, 42 mm bearing on top), 4 mm stack
- Bearing: Enduro stainless steel cartridge bearing, sealed, 36 x 45 degree bevel, lifetime manufacturer warranty
- Scope of Delivery: 1 headset top cup with bearing, stem cap with hollow bolt, star nut
- Extras:
- O-ring on the steerer and lip seal over the bearing
- star nut for steel and aluminium steerers only, a carbon steerer needs a compression plug
- stem cap bolt torque 2-3 Nm max, use a torque wrench
- MK0 machine finish, 44 % lighter than the Premium top cup
- matches the Wolf Tooth IS52/40 lower cups
- not for Specialized mountain bikes and Campagnolo Hiddenset
- weight 30 g (manufacturer)
- made in the USA
