Mountain Bike Stem review

Mountain Bike Stem Review

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About Mountain Bike Stem

When you first look at them, the best mountain bike stems might seem basic. But they actually make a big difference to how your bike performs. Things like weight, stiffness, and length all matter and affect how your bike handles turns. We’ve tried out lots of different stems to find out which ones are the best and which ones work best for different situations and rider preferences. If you want to upgrade your handlebars and grips to make your ride more comfortable and better performing, check out our guides to the best mountain bike handlebars and MTB grips.

Race Face Turbine R 35

Top-rated stem with lots of size and colour options

Weight: 124g (32mm) | Colors: Many | Lengths: 32, 40, 50, 60, 70mm | Clamps: Only fits 35mm | Stack height: 43mm | Rating: 10/10

Reasons to buy: • Comes in many colours and lengths

Reasons to avoid: • A bit pricey

The Race Face Turbine R stem comes in a rainbow of colours, letting you pick your favourite. It’s strong enough for wide handlebars and tough builds. You can even get a short 32mm version for really direct steering. The clamp holds the bars tight and spreads the weight evenly. Plus, the edges are rounded off so they won’t bump into your knees. What’s great about the Race Face Turbine R35 is that it’s stiff even though it’s lightweight. With an 800mm Next R bar attached, the steering feels precise and responsive, with just the right amount of give.

mountain Bike Stem reviews

Spank Spoon 350 stem

Great for cool colours

Weight: 140g | Colors: Nine, including black | Lengths: 35mm, 45mm | Clamps: 31.8mm, 35mm | Stack height: 35mm | Rating: 9/10

Reasons to buy: • Very strong and tough • No bending • Good value

Reasons to avoid: • Not the fanciest • Some rough spots in the making

The Spank Spoon stem is made by forging, not machining, which makes it very strong. The 350 version has a 35mm clamp, but there’s also a 31.8mm one called the 318. Spank didn’t make the bar clamp without a gap, so there’s a space at the top of the faceplate, and you have to tighten all four bolts evenly. The stack height is low, and there’s no rise, so it’s good if your bike’s head tube is tall and you can’t lower the bars enough. There are only a few lengths available, but they’re the most popular ones, and Spank offers lots of colors! It’s not as perfect as the Race Face Turbine, but it’s cheaper.

EThirteen Base 35

Best for comfortable knees

Weight: 155g | Colors: Black | Lengths: 40, 50mm | Clamps: 35mm only | Stack height: 40mm | Rating: 10/10

Reasons to buy: • Does what you need for less money • Soft edges are nice for your knees

Reasons to avoid: • Not as fancy-looking as others

Mountain Bike Stem

The EThirteen Base is a great stem that’s sturdy and looks good. It comes in short 40mm and 50mm lengths. It has bolts with T25 heads facing each other, and the faceplate doesn’t have any gaps, making it easy to tighten the bolts without overdoing it. The clamp is wide and the edges are rounded, so you won’t hit your knee when standing up. It’s for 35mm bars and a good choice if you want a tighter cockpit without spending too much. A really good stem for a really good price.

Nukeproof Horizon

Weight: 135g (35mm) | Colors: 7 options | Lengths: 35, 50mm | Clamps: 31.8, 35mm | Stack height: 35mm | Rating: 9/10

Reasons to buy: • Nice looks • No gap in the front plate • Seven colour choices • Low price

Reasons to avoid: • Not the strongest

Nukeproof’s Horizon range has some good products that cost less than others. It’s not surprising because Nukeproof used to make parts before they started making bikes. One good thing about the Horizon stem is that it’s short, which is good if your bike’s steerer tube is too short or the head tube is too long. With a 5º angle, you can turn the stem upside down to lower your cockpit even more. We like the smooth, rounded edges and simple design, so it’s a good upgrade even if you don’t have a Nukeproof frame.

DMR Defy 35

Top stem for ultra-low stack height

Weight: 174g | Colors: Black, silver | Lengths: 35mm, 50mm | Clamps: 31.8mm, 35mm | Stack height: 28mm | Rating: 9/10

Reasons to purchase: • Extremely secure • Elevates your front end with minimal stack height • Reasonable price

Reasons to avoid: • Relatively hefty weight • Square-edged appearance might not suit all bikes

MTB Stem Mountain Bike Stem

The Defy stem is crafted to complement DMR’s Wingbar aesthetically, but it offers features that make it appealing for any cockpit setup. Its twin face plate clamps employ a Top-Close clamp design, where you tighten both top bolts until they touch the stem body before securing the lower bolts, ensuring straightforward, secure, and effective bar installation. The bar clamp gradually narrows down the steerer clamp, resulting in one of the lowest stack heights available. At just 28mm, this makes the Defy ideal for adjusting stem/bar height (and consequently your bike’s effective reach distance), or if you’ve trimmed your steerer tube too short (a common issue). A standout feature of the Defy stem is its compact 35mm length, which also provides a slight rise (at least 5mm), making it convenient for raising your handlebar height without needing stem spacers or a new handlebar.

Burgtec Enduro MK3: A Unique Length Offering

Looking for a stem with a difference? The Burgtec Enduro MK3 presents a game-changer with its innovative 42.5mm length option. With a cold-forged construction method, this version boasts enhanced stiffness compared to its predecessor, the Enduro MK2. The widened bar clamping width and increased steerer clamp depth contribute to its robustness. However, riders with minimal fork steerers may find the increased stack height less compatible. The standout feature of the Burgtec Enduro MK3 is undoubtedly its availability in a 42.5mm length, catering to riders seeking subtle adjustments in stem length for optimal performance.

Renthal Apex 35: Lightweight Performance

For those prioritizing weight savings, the Renthal Apex 35 emerges as a top contender. Weighing in at a mere 116g (33mm), it claims the title of the lightest stem on a test. Its twin face plate design features 240° wrap-around clamps, ensuring excellent bar support. However, users should exercise caution during installation to avoid surface scratches or misalignment. Additionally, the stem offers a slight rise of approximately 6°, a rare feature in shorter stems, providing added comfort and versatility. Whether you’re tackling rugged trails or demanding terrains, the Renthal Apex stem delivers a harmonious blend of performance and aesthetics.

RaceFace Chester Stem for MTB

Renthal Apex 35: Optimal for Weight Reduction

Weight: 116g (33mm) | Colors: Black & gold | Lengths: 33, 40, 50, 60mm | Clamps: 31.8mm, 35mm | Stack height: 40mm | Rating: 9/10

Benefits of Purchase: • Most lightweight stem during examination • Unique wraparound bar clamps • Distinctive appearance

Considerations to Avoid: • Relatively high cost with no colour alternatives • Requires careful handling during installation • Limited to a six-degree rise

The Renthal Apex implements a dual face plate layout, akin to numerous other stems. However, the clamps here encompass a 240° wrap-around mechanism that aids in bolstering the bar. Exercise caution during bar installation to prevent surface scratches or misalignment. Employing a torque wrench is strongly advised to ensure precise bolt tightening.

Furthermore, it is noteworthy for its slight rise (approximately 6°), a rare feature among stems under 50mm in length. Additionally, akin to Renthal’s handlebars, there is a minor yet perceptible flex evident under heavy front-end loading. This characteristic could be advantageous or disadvantageous depending on rider’s position. If you presently perceive your 35mm standard front end as excessively harsh, Renthal’s Apex stem may provide a viable solution.

FIFTY-FIFTY Alloy Mountain Bike Stem

Evaluating the Best Mountain Bike Stems

Our testing process involved rigorous evaluation across a diverse range of test bikes and experienced riders to gauge long-term durability and performance. Stems underwent meticulous testing, including back-to-back comparisons against benchmark models to assess stiffness and overall performance consistency. To ensure optimal performance and safety, all bolts were meticulously greased and tightened to recommended torque settings using precision torque wrenches.

A mountain bike stem is a vital component that connects your handlebars to the fork steerer, allowing you to customize your riding position. Typically, modern stems measure under 70mm in length, with 40mm and 50mm being the most commonly preferred sizes. They usually feature twin bolts to secure around the steerer tube and four bolts at the faceplate to attach the handlebar securely.

Determining Compatibility: Fork Steerer Size and Handlebar Diameter

Before selecting a stem for your bike, it’s crucial to ensure compatibility. Begin by identifying your fork’s steerer size and handlebar diameter. Most fork steerers have a standard 1-1/8-inch diameter, while handlebar diameters on modern mountain bikes typically range between 31.8mm and 35mm. Measure the clamp area accurately to determine the correct diameter, as this ensures a proper fit.

Short MTB Handlebars

Choosing Between 31.8mm and 35mm Diameter

Deciding between a 31.8mm and 35mm handlebar diameter depends on various factors, including rider preference, bike type, and terrain. Riders with powerful e-bikes tackling bike park trails and enduro tracks may benefit from the sturdiness of a 35mm diameter. However, for most riders, a 31.8mm diameter offers sufficient performance and comfort, especially in terms of flexibility.

Determining the Ideal Stem Length

Selecting the right stem length is crucial for achieving optimal handling and comfort on your bike. While the average stem length in the mountain bike market hovers around 40mm, preferences may vary based on individual riding style and terrain. Shorter stems, such as those around 40mm, provide snappier steering, ideal for manoeuvring through technical trails. On the other hand, longer stems, up to 50mm, offer improved weight distribution and alleviate feelings of bike crampiness.

Understanding Bolt Sizes and Clamping Forces

Mountain bike stems typically feature 4mm and 5mm Allen bolts for secure attachment. Larger-diameter bolts provide higher torques and clamping forces, ensuring enhanced stability. Some stems may incorporate T25 Torx bolts, known for their resistance to rounding off, offering added durability and reliability.

Mountain Bike Stems Short Handlebar

Exploring Stack Height and Zero-Gap Clamp Designs

Stack height refers to the vertical space the stem occupies on the steerer tube, influencing handlebar height and overall stiffness. Stems with zero-gap bar clamp designs simplify installation, reducing the number of bolts required and ensuring even tensioning for a secure fit.

Examining Stem Rise and Construction Methods

Stem rise denotes the height differential between clamps and affects handlebar elevation. While most stems are zero-rise, allowing for adjustable bar height, models with a six-degree rise offer versatility in bar positioning. When it comes to construction, stems are either 3D forged or CNC machined from aluminium billets. While forging results in denser, stiffer products, CNC machining offers precise shaping and intricate designs, catering to diverse rider preferences and performance needs.

Mountain Bike Stem Caps

When it comes to customizing your mountain bike, every detail counts. Among the myriad of components that make up your bike, the humble stem cap might seem insignificant at first glance, but it’s a canvas for personal expression and functionality. In this article, we delve into the world of mountain bike stem caps, exploring their importance, styles, and FAQs.

Why Mountain Bike Stem Caps Matter

Enhancing Aesthetic Appeal

The stem cap sits prominently at the front of your bike, making it a prime location for adding a touch of personality. Whether you prefer sleek minimalism or vibrant designs, the stem cap is your opportunity to make a statement on the trails.

CYSKY Bike Stem 31.8

Protection and Durability

Beyond aesthetics, stem caps serve a practical purpose by protecting the headset bearings from dust, debris, and moisture. Opting for a high-quality stem cap ensures longevity for your bike’s vital components, contributing to smoother rides and fewer maintenance headaches.

Weight and Material Considerations

While often overlooked, the weight and material of your stem cap can impact your bike’s overall performance. Lightweight aluminium or carbon fiber stem caps offer durability without adding unnecessary bulk, ideal for riders seeking optimal performance on challenging terrain.

Types of Mountain Bike Stem Caps

Customizable Designs

From laser-etched graphics to engraved logos, customizable stem caps allow riders to showcase their individuality. Companies like XYZ Custom Caps offer a plethora of design options, ensuring a unique touch to your ride.

MEISCHE Upgraded MTB Stem

Integrated Tool Storage

For the practical-minded rider, stem caps with integrated tool storage provide a convenient solution for on-trail repairs. Brands like TrailTorch offer stem caps equipped with hidden compartments for storing essential tools like Allen keys and tire levers.

FAQs: Answering Your Queries

Q: Are Mountain bike stem caps compatible with all bikes?

A: Yes, most stem caps feature a universal design compatible with standard 1 1/8-inch steerer tubes, ensuring compatibility with the majority of mountain bikes.

Q: Can I install a stem cap myself?

A: Absolutely! Installing a stem cap is a straightforward process that requires basic tools and minimal mechanical knowledge. Most stem caps come with simple instructions for easy installation.

Q: Do stem caps affect bike performance?

A: Generally, stem caps have negligible effects on bike performance due to their lightweight nature. However, opting for excessively heavy or bulky stem caps may impact handling and responsiveness.

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