Best Threadless Cycling Stems of 2025

The M Part Stem Adapter is a practical solution for cyclists looking to upgrade their bike's steering system. This split aluminium shim fits securely over a 25.4 mm steerer tube, increasing it to 28.6 mm. This conversion allows you to use stems designed for 1-1/8 inch tubes, giving you a wider selection of options. The black anodised finish not only enhances durability but also adds a sleek look, while the laser etched detail ensures clear visibility of specifications. Enjoy greater flexibility and style with this essential cycling accessory.

The QWORK® Bike Stem Riser is crafted from high-quality aluminium alloy, making it strong, lightweight, and rust-resistant. Its polished anodised finish ensures durability while enhancing your bike's aesthetics. This extender offers adjustable height with four spacer rings, allowing you to raise your stem from 50mm to 75mm. This feature is particularly useful for customising your riding position for greater comfort. Additionally, it is compatible with most bikes that have a 1-1/8'' (28.6mm) threadless steerer, making it a versatile choice for various cycling styles.

The Profile Design Converter is an essential accessory for cyclists looking to upgrade their bike's steering system. This converter allows you to adapt a 1 inch quill steerer to a 1-1/8 inch threadless stem, making it easier for you to customise your bike’s setup. With its unisex design, it suits a wide range of users. The included components ensure you have everything you need for a seamless installation, enhancing your cycling experience with improved stability and control.

The Azarxis Stem Adapter offers a practical solution for increasing your handlebar height, enhancing your cycling comfort. Made from durable 6061 Aluminium Alloy, it ensures a strong and secure fit. With a size that accommodates both 22.2mm and 25.4mm steerer tubes, this adapter is versatile for most bikes. Installation is straightforward, allowing you to convert your threaded quill setup to threadless effortlessly. This means you can easily tailor your bike's setup to better suit your riding style.

The TRIWONDER Stem Riser is designed for cyclists seeking comfort and adjustability. Made from high-strength 6061 aluminium alloy, it is 20% lighter than standard extenders, making your rides more efficient. The adjustable gaskets allow you to customise the height to suit your preferences, ensuring a better fit for your riding style. Installation is straightforward; simply connect it to the original front stem and tighten, providing flexibility when raising the fork stem. This extender enhances your climbing ability, offering a comfortable and convenient cycling experience.

The F Fityle Stem Adapter is an excellent choice for cyclists looking to enhance their riding experience. Made from high-quality aluminium alloy, this sturdy yet lightweight adapter raises the height of your handlebars, providing improved comfort and control. Its easy installation means you can quickly adjust your setup without hassle. Additionally, this versatile product converts mountain bicycles and folding bikes from threaded quill to threadless, allowing you greater flexibility in upgrades and adjustments. This is an ideal solution for those wanting to adapt their bike with ease.

The PLATT Stem Extender is crafted from high-strength aluminium alloy, ensuring durability while being beautifully anodised in a variety of colours. You can easily adjust the height by using the gasket, offering a maximum extension of 2.7 inches (70 mm), allowing you to customise your riding position for optimal comfort. Installation is straightforward, as the extender clamps onto the steerer and the stem clamps to the extender, making it a hassle-free upgrade. With its colourfast surface, this extender not only performs well but also looks great on your bike.

The LGEGE Fork Extension is designed to enhance your cycling experience by allowing you to adjust your handlebar height for a more comfortable ride. With a total length of 180mm and a robust construction from high-quality aluminium alloy, this product is both strong and durable. It fits most bicycles with a 1-1/8" threadless quill, making it versatile for various types of bikes. Installation is straightforward; simply remove the original stem riser and secure the extender in place, ensuring you can easily tailor your bike to your preferences.

The LERWAY Stem Riser is designed to enhance your cycling experience by providing a perfect fit for most bikes with a 1-1/8'' (28.6mm) threadless steerer. With an adjustable height option that allows for an increase of up to 85mm, you can easily customise your riding position for optimal comfort. The inclusion of four spacers and two hex keys makes it simple to adjust the stem height to meet your specific needs. Installation is straightforward; simply slide it onto the steerer tube and tighten it for a secure fit.

The Dymoece Stem Riser is crafted from durable 6061 aluminium alloy, ensuring longevity and strength for your bike. With a maximum height extension of 115mm, you can easily adjust the riser to fit your comfort level, making your rides more enjoyable. The included spacers (1 × 5mm & 1 × 10mm) allow for further customisation, ensuring the perfect fit for your height. Plus, installation is straightforward, meaning you can quickly set it up and get back on the road or trail.