Eternal Stem with Topcap

What Our Gearhead® Experts Are Saying:

"I put the Eternal Stem on my DH rig for a full race season and steering precision never wavered, even under heavy braking into rough sections. The stiffness up front lets me commit to lines I'd hesitate on with a softer stem."

We look for front end components that hold up when speed and terrain get serious, and the Eternal Stem is built squarely for that demand. Designed through simulation and extensive real world testing, it targets downhill, enduro, and e-bike applications where steering precision under load isn't optional.

The stem is CNC-milled entirely from aerospace grade aluminum, available in 35mm or 42mm lengths with a 39.2mm fork clamp height. A 55mm handlebar clamp width delivers meaningful cockpit stiffness while remaining compatible with nearly any handlebar regardless of rise, so riders aren't locked into a narrow bar selection to make the fit work. The included topcap and full hardware set, six stem screws plus a silver headset cap screw, round out a complete front end install.

Certification runs to ASTM Category 5, and the stem carries a 130kg (286.6lb) weight rating, making it a legitimate option for heavier e-bike platforms as well as standard DH and enduro builds. Handlebar compatibility spans the vast majority of bars on the market, so swapping into an existing cockpit rarely requires additional parts beyond the stem itself.

Riders racing DH or enduro, or running e-bikes that demand a higher weight rating, will get the most out of the Eternal Stem's combination of stiffness, steering precision, and certified durability under real load.