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OAK Components
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Eternal Stem with Topcap

$159.00

Style & Size:

Quantity

Only 2 In stock

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Aggressive lines, aggressive stem, meet the Eternal Stem

What Our Gearhead® Experts Are Saying:


"I ran the Eternal Stem on my enduro bike through a full season of steep, chattery descents and never once questioned the front end. Steering feels direct and locked in, even when I'm forcing a line I probably shouldn't be taking."


Speed exposes weak points fast, and the front end of your bike is usually the first place you feel it. The Eternal Stem is built for riders pushing into that territory, holding a line through rock gardens and off camber chutes without a hint of flex or hesitation.


Machined from aerospace aluminum and rated to ASTM Category 5, it's approved for downhill, enduro, and e-bike use, the kind of certification that matters when you're carrying real speed into a blind corner. A 55mm clamp width adds stiffness up front while still working with handlebars across a wide range of rise, so the fit stays dialed no matter what bar you're running.


Details

  • A downhill and enduro stem built for aggressive riding
  • Rated ASTM Category 5 for the hardest hits on trail
  • 55mm clamp width adds stiffness without limiting bar choice
  • Available in 35mm or 42mm length to fit your setup
  • Aerospace aluminum, 100% CNC-milled for precision
  • Approved for e-bike use up to 130kg rider weight
  • CNC construction holds tight tolerances ride after ride
  • Item #OKC0005
Material
aerospace aluminum, 100% CNC-milled
Length
35mm, 42mm
Clamp Diameter
55mm
Bar Attachment
55mm handlebar clamp width
Claimed Weight
[35mm] 5.1oz (145.6g), [42mm] 5.6oz (158.6g)
Activity
downhill mountain biking, enduro mountain biking, e-biking
Includes
1x Eternal Stem, 1x Eternal Topcap, 1x Headset Cap Screw (silver), 6x Stem Screws, 1x OAK Sticker Pack, 1x User Manual

Related Categories

  1. Mountain Bike Stems
  2. Mountain Bike Cockpit Components
  3. Mountain Bike Flat Handlebars
  4. Mountain Bike Riser Handlebars
  5. Mountain Bike Headsets
  6. Mountain Bike Grips
  7. Mountain Bike Components
  8. Bike Components
  9. Enduro Mountain Bikes
  10. Downhill Mountain Bikes

Frequently Asked Questions

  • What handlebar and steerer fit the OAK Components Eternal Stem with Topcap?
    The stem uses a 35 mm handlebar clamp with a 55 mm-wide clamping area and fits a standard 1 1/8-inch steerer. Choose a handlebar with at least approximately 56 mm of usable clamping surface.
  • How do the 35 mm and 42 mm OAK Eternal Stem lengths affect cockpit setup?
    The Eternal Stem is available in 35 mm and 42 mm lengths; choose between them based on your bike’s handling and reach needs. The catalog lists this Copper version in 42 mm.
  • Is the OAK Components Eternal Stem suitable for downhill and enduro riding?
    Yes. It is 100% CNC-milled from aerospace aluminum and carries an ASTM Category 5 rating for aggressive riding, including downhill and enduro.
  • What is the rider weight limit for the OAK Eternal Stem on an e-bike?
    The stem is approved for e-bike use up to 130 kg (286.6 lb). Keep the combined setup within that stated rider-weight limit.
  • What comes with the OAK Components Eternal Stem with Topcap?
    The package includes 1 Eternal Stem, 1 matching Eternal Topcap, 1 silver headset cap screw, and 6 stem screws, plus a user manual and sticker pack.