Satori Heads‑UP4 Stem Riser 1-1/8" — Adjustable Handlebar Extender, +78mm Rise, 6061 Aluminum

If your mountain bike feels too stretched out or you want a less aggressive posture for trail days and commuting, the Satori Heads‑UP4 stem riser lets you quickly increase handlebar height without changing forks or replacing the whole stem. Precision machined from heat‑treated 6061 aluminum, this extender installs into standard 1‑1/8" steerers and includes spacers and hardware so you can fine‑tune height and stack. It’s a lightweight, reversible modification that keeps your cockpit geometry adjustable while retaining headset function.

How much height does the Heads‑UP4 add and can I fine‑tune it?

The Heads‑UP4 provides a maximum rise of 78mm and a total unit height of 117mm. You can dial in the exact handlebar position using the included mix of spacers, allowing small incremental changes to reach the fit you want.

• Maximum rise: 78mm
• Total extender height: 117mm
• Included spacers: 10mm, 8mm, 2×5mm for precise adjustment
• Comes with headset cap and bolt for straightforward installation

Will this fit my bike’s steerer tube?

Satori Heads‑UP4 is designed specifically for 1‑1/8" (28.6mm) straight steerer tubes; it is not compatible with 1" steerers. It slips into the steerer and integrates with your existing headset stack, so you keep headset function and alignment.

• Compatibility: all 1‑1/8" (28.6mm) fork steerers
• Not compatible with 1" steerers or tapered steerers without adapters
• Base diameter matches 1‑1/8" standard for secure fit

How durable and heavy is the extender?

The Heads‑UP4 balances light weight and strength by using heat‑treated 6061 aluminum with reinforced construction. At about 225 grams (0.49 lbs), it adds minimal mass while delivering a robust connection between your fork and stem for trail and urban use.

• Material: heat‑treated 6061 aluminum for strength
• Weight: 225 g (0.49 lbs)
• Manufactured in Taiwan with quality control and finishing

What’s included and what warranties are offered?

Heads‑UP4 ships ready for installation with the hardware and spacers needed to set the ride height you want. Satori backs the product with a five‑year warranty, reflecting the brand’s confidence in materials and workmanship.

• Package contents: extender, 10mm/8mm/2×5mm spacers, headset cap, bolt
• Warranty: 5‑year manufacturer warranty from Satori
• Origin: Made in Taiwan

Who is this for? Riders who want a simple, reversible way to increase handlebar height—mountain bikers seeking a more upright posture on technical terrain, commuters wanting better comfort, and anyone avoiding a full stem replacement or fork change will benefit. If your bike has a 1‑1/8" straight steerer and you prefer adjustability, the Satori Heads‑UP4 offers a lightweight, durable solution to refine your fit and comfort without altering frame geometry.