TOOPRE Hidden Bike Stem Riser, Aluminum Alloy Bicycle Handlebar Height Extender for MTB Road Bike Fork Steerer Tube

The TOOPRE Hidden Bike Stem Riser is designed to raise the handlebar height while maintaining a clean and integrated appearance. Unlike traditional external stem extenders, this hidden heightening device installs inside the fork steerer tube, helping improve riding comfort without leaving obvious height extension marks.

Made from durable aluminum alloy, it features a compact, lightweight, and detachable design. The adjustable washer system allows the handlebar height to be increased or reduced according to your riding needs, making it suitable for mountain bikes, road bikes, urban bikes, and most standard bicycle fork installations.

With wide compatibility and easy installation, this hidden stem riser is a practical upgrade for riders who want a more comfortable riding posture and a cleaner bike cockpit.

Key Features

• Hidden heightening design for a clean and integrated appearance
• Helps raise handlebar height and improve riding comfort
• Made of lightweight and durable aluminum alloy
• Adjustable height range by adding or removing spacers
• Height can be increased by approximately 3–55mm
• Compact and lightweight design compared with traditional stem extenders
• Suitable for MTB, road bikes, urban bikes, and most standard bicycles
• Compatible with fork steerer inner diameter 24.6–25.4mm
• Uses a 6mm hex socket for locking the pressing screw
• Easy to install and remove

Specifications

Product Size

Manual measurement may have slight deviations. Please refer to the actual product.

Package Includes

• 1 × Pressing Screw
• 1 × Expansion Ring
• 1 × Top Cover
• 1 × Inner Tube
• 1 × Nut
• 1 × 20mm Spacer
• 2 × 10mm Spacers
• 2 × 5mm Spacers
• 1 × 3mm Spacer
• 1 × Bottom Ring

Installation Steps

1. Remove the stem top cap and stem locking screw with a wrench, then remove the handlebar/stem.
2. Remove the original star nut or expander if needed, then insert the TOOPRE hidden stem riser into the fork steerer tube.
3. Add or remove spacers according to the required handlebar height.
4. Tighten the upper pressing screw to lock the riser securely.
5. Reinstall the stem and top cap, then tighten the stem bolts to complete the installation.