Mountain Bike Handlebar Riser, 25.4/31.8mm Clamp, Height Increase Angled Adapter

Elevate your mountain biking comfort with this Adjustable Handlebar Stem, a versatile riser that increases cockpit height and fine-tunes your riding position. Built for durability and smooth control, it lets you adapt to varying terrains and ride styles without swapping out your entire cockpit. With a robust aluminum alloy 6061 construction, this stem keeps weight in check while resisting the bumps and spray of trail riding. The design supports both 25.4mm and 31.8mm handlebar clamps and features a precise 28.6mm fork clamp, making it a practical upgrade for riders seeking a taller, more comfortable riding position and improved visibility on climbs and descents. Color Sand Black and crafted in Mainland China, this stem blends cleanly with most setups and enhances stability on rough trails.

Whether you’re tackling long endurance rides, steep ascents, or technical descents, this adjustable stem helps you dial in the exact height and angle you need. The angle can be adjusted by ±60 degrees, and the height range from 56 to 65mm gives you a wide band to experiment with. With multiple length options, you can tailor the setup to your frame size and riding style for better leverage, more control, and reduced fatigue on longer sessions.

Notes for correct fitment: The front fork lock hole diameter is 28.6mm, while the handlebar lock holes come in 31.8mm or 25.4mm. Choose the stem that matches your handlebar diameter (31.8mm or 25.4mm). For example, a 31.8 adjustable stem of 110mm length has a front fork lock hole of 28.6mm and a handlebar lock hole of 31.8mm.

Available specifications include 31.8*130mm, 31.8*110mm, 31.8*90mm, and 25.4*110mm, 25.4*90mm. Height increases vary with length: about 5 cm for 90mm, about 7 cm for 110mm, and about 8 cm for 130mm. This lets you choose how much you want your cockpit to rise, giving you the flexibility to adapt to different bikes or riders within the same setup.

Origin: Mainland China. Material: Aluminum Alloy 6061. Type: Bicycle Stem. Brand: NONE. Color: Sand Black. Fork Clamp Diameter: 28.6mm. Handlebar Clamp Diameter: 28.1–29.5mm. Height: 56–65mm. Note: When ordering, if two pieces are purchased, color can be remarked; otherwise the default order color applies. Allow a 1–2 mm tolerance due to manual measurement. All products in our store support direct sales.

Benefits & Tips

• Improve riding comfort on long climbs and rough terrain by raising the handlebar to a natural, upright position, reducing neck and back strain.
• Fine-tune handling: adjust height and angle to optimize control during steep descents, technical sections, or high-speed sections on trails.
• If you ride multiple bikes, note clamp diameters (31.8mm vs 25.4mm) and choose the stem that matches each handlebar to ensure a secure fit.

Product specifications

• Brand Name: NONE
• Choice: Yes
• Fork Clamp Diameter: 28.6mm
• Handlebar Clamp Diameter: 28.1–29.5mm
• Height: 56–65mm
• Material: Aluminum Alloy 6061
• Origin: Mainland China
• Type: Bicycle Stem
• Semi_Choice: Yes
• Name: Adjustable stem
• Specifications: 31.8*130mm / 31.8*110mm / 31.8*90mm / 25.4*110mm / 25.4*90mm
• Color: Sand Black
• Note: Front fork lock diameter is 28.6mm; handlebar lock diameter options are 31.8mm or 25.4mm. Match according to handlebar diameter.
• Angle: Adjustable, ±60 degrees
• Maximum height increase by length: 90mm ≈ 5 cm, 110mm ≈ 7 cm, 130mm ≈ 8 cm
• Examples included for fit: 31.8 adjustable stem 110mm long; front fork lock 28.6mm; handlebar lock 31.8mm; length 110mm

Package includes:

• 1x Adjustable stem

Warnings / Reminders

• Ensure you select the correct handlebar clamp diameter (31.8mm or 25.4mm) to match your handlebars.
• When purchasing two stems, you can request color remarks; otherwise the order color will be the default.
• Due to manual measurement, size may vary by 1–2 mm.
• All products in our store support direct sales.

All electronic and mechanical equipment, devices and machines sold by InterCyprus to EU countries are CE certified and carry a two year warranty.

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