FULL SPEED AHEAD OS-167 Stem Bar Clamp Deg 840031073648 60MM 31.8MM /-6

( Brand: Full Speed Ahead ), ( Manufacturer Part Number: OS-167 ), ( Part Type: Stem Bar Clamp ), ( Color: Black ), ( Stem Type: Threadless ), ( Set Includes: Stem ), ( Material: Aluminum ), ( Steerer Tube Diameter: 1 1/8 In ), ( California Prop 65 Warning: Standard ), ( Manufacturer Warranty: 2 Years ), ( Clamp Diameter: 31.8 Mm ), ( Stem Angle: Deg ), ( Compatible Bike Type: Mountain Bike, Road Bike, Touring Bike, Urban Bike Fixed Gear, Universal, Fitness-/crossbike, Cyclocross Bike ), ( Country Of Origin: Taiwan ), ( UPC: 840031073648 )

Review FULL SPEED AHEAD Stem 60mm Length 31.8mm Bar Clamp /-6 Deg

The **AHEAD OS-167 STEM 60mm 31.8mm Bar Clamp** is a precision-engineered, high-performance clamping solution designed to deliver unmatched stability, versatility, and durability for a wide range of industrial, workshop, and DIY applications. Crafted from a robust **6061-T6 aluminum alloy**, this clamp combines lightweight strength with exceptional rigidity, ensuring it can securely hold even the heaviest or most rigid materials without flexing or warping under pressure. Its **31.8mm (1.25-inch) clamping width** provides a generous grip range, accommodating everything from slender rods and pipes to thicker bars, while the **60mm (2.36-inch) overall length** offers ample leverage for tight, even clamping force ideal for applications where precision alignment is critical. The **adjustable -6 to 6 tilt mechanism** allows for precise angular adjustments, enabling the clamp to conform to sloped surfaces, angled workpieces, or uneven mounting plates without compromising stability. This feature is particularly valuable in machining, fabrication, or assembly tasks where slight deviations in orientation could lead to misalignment or inaccuracies. The clamp s **smooth, low-friction sliding action** is facilitated by high-quality bearings and a polished aluminum surface, reducing wear and ensuring consistent performance over thousands of uses. Its **quick-release mechanism** allows for rapid adjustments or swaps, saving valuable time in dynamic work environments, while the **self-locking design** prevents accidental slippage once the desired tension is achieved. The **anodized finish** not only enhances corrosion resistance but also provides a non-slip grip for the adjustment knob, making fine-tuning effortless even with gloved hands. Whether mounted on a **STEM (Standard Tooling Module) rail system** for modular flexibility or secured to a workbench with its included mounting holes, this clamp integrates seamlessly into both permanent setups and temporary rigging scenarios. Its **universal compatibility** with standard tooling systems ensures it can be easily incorporated into existing workflows, while its **compact yet sturdy construction** minimizes workspace clutter without sacrificing functionality. Built to withstand the demands of heavy-duty use, the OS-167 is an indispensable tool for engineers, machinists, fabricators, and hobbyists who require a clamp that balances precision, adjustability, and longevity making it a standout choice for professionals who demand nothing less than excellence in their tooling.

### Pros and Cons of buying a OS-167 Stem (60mm, 31.8mm, -6 to 6 Bar Clamp)

1. **Compatibility with Modern Frames** The 60mm BB (bottom bracket) shell width is standard for many modern road, gravel, and endurance bikes, making it a versatile choice for riders upgrading or replacing stems. The 31.8mm clamp diameter is also widely supported, ensuring broad compatibility with handlebars.

2. **Adjustable Angle** The -6 to 6 range allows for fine-tuning the handlebar position to suit rider preferences, ergonomics, or specific riding styles (e.g., aggressive aero positioning or relaxed comfort). This adjustability can improve aerodynamics, reduce strain, or enhance control, depending on the rider s needs.

3. **Durability and Build Quality** OS (Open System) stems are known for their robust construction, often featuring aluminum or carbon fiber materials that balance strength and weight. The bar clamp design is typically reinforced to handle the stresses of aggressive riding or high-speed cornering.

4. **Aesthetic and Customization** The OS-167 stem is a popular choice among custom bike builders and enthusiasts due to its clean, minimalist design. It can be paired with a variety of handlebars, making it suitable for builds that prioritize style as well as function.

5. **Compatibility with Dropper Post Systems** Many OS stems are designed to work seamlessly with dropper post systems (e.g., Salsa, RockShox, or Fox), allowing for quick adjustments to handlebar height without removing the stem. This is particularly useful for riders who frequently switch between riding positions.

6. **Widespread Availability and Aftermarket Support** As a well-established part, the OS-167 stem is easy to find in bike shops, online retailers, and through aftermarket suppliers. This means parts like spacers, lockrings, or replacement stems are readily available if needed.

7. **Lightweight Options** Carbon fiber versions of the OS-167 stem are available, offering a significant weight savings over aluminum while maintaining stiffness. This can be beneficial for climbers or riders who prioritize efficiency.

8. **Versatility Across Disciplines** While often associated with road cycling, the OS-167 stem s adjustability and compatibility make it suitable for gravel, cyclocross, and even some endurance or adventure bikes where handlebar positioning is critical.

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1. **Limited Aero Performance** Unlike dedicated aero stems (e.g., those with deep fork offsets or integrated fairings), the OS-167 stem is not optimized for aerodynamics. Riders focused on speed in time trials or triathlon may find it less efficient than specialized aero stems.

2. **Potential for Over-Tightening** The bar clamp mechanism requires careful tightening to avoid stripping the threads or damaging the handlebar. Over-tightening can lead to handlebar slippage or even breakage, especially with carbon handlebars, which are more prone to damage from excessive force.

3. **Compatibility Gaps** While common, not all frames or forks use a 60mm BB shell width. Some older or niche builds may require additional spacers or adapters, adding complexity to installation. Additionally, some handlebars may not fit perfectly due to slight variations in clamp diameter or shape.

4. **Cost Relative to Simpler Stems** Compared to basic stems (e.g., 25.4mm clamp, non-adjustable), the OS-167 offers more features but may not justify the price for riders who don t need the adjustability or compatibility benefits. Carbon versions, in particular, can be expensive.

5. **Installation Complexity** Adjusting the stem angle requires removing the stem, which involves disassembling the handlebar and potentially the brake/levers. This can be time-consuming and may require tools like a stem tool or Allen keys, depending on the lockring design.

6. **Weight Considerations** While carbon versions are lightweight, aluminum OS stems can be heavier than ultra-lightweight alternatives (e.g., some carbon road stems). This may not be a significant issue for most riders but could matter in weight-sensitive builds.

7. **Potential for Misalignment** If the stem is not installed squarely or the angle is not set correctly, it can lead to handlebar wobble, poor steering response, or even frame stress over time. This requires precision during installation.

8. **Limited Color/Finish Options** Compared to some aftermarket stems, the OS-167 may have fewer color or finish options, which could be a consideration for riders who prioritize aesthetics.

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The OS-167 stem is a highly versatile and widely compatible choice for riders who prioritize adjustability, durability, and broad handlebar compatibility. Its ability to fine-tune handlebar position makes it ideal for custom builds, endurance riding, or riders who frequently switch between aggressive and relaxed positions. The stem s robustness and aftermarket support also ensure longevity and ease of maintenance.

However, its limitations such as lack of aero optimization, potential installation complexity, and higher cost for carbon versions may not make it the best fit for riders focused solely on speed, simplicity, or ultra-lightweight builds. If aerodynamics are a priority, a dedicated aero stem would be a better investment. For most casual to intermediate riders, enthusiasts, or those building custom bikes, the OS-167 stem offers an excellent balance of functionality and flexibility.

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- You need a stem with adjustable angle for ergonomic or performance tuning.

- You re building a custom bike or upgrading a frame that requires a 60mm BB shell and 31.8mm clamp.

- You prioritize durability, compatibility with dropper posts, and aftermarket support.

- You want a stem that works with a variety of handlebars for different riding styles.

- You re primarily focused on aerodynamics (e.g., time trials, triathlon) and would benefit from a dedicated aero stem.

- You prefer simplicity and don t need adjustability (a basic stem may suffice).

- You re on a tight budget and can find a lighter or cheaper alternative that meets your needs.

- You re unsure about installation or maintenance, as the adjustability adds complexity.

**Final Verdict:** For most riders seeking a balance of adjustability, compatibility, and quality, the OS-167 stem is a strong and reliable choice. Pair it with a quality handlebar and ensure proper installation to maximize its benefits.

Details:

Full Speed Ahead OS-167 Stem 60mm length 31.8mm Bar Clamp /-6 deg used, very good, no scratches.

part #: os167 prices

• $40.61-$50.22

specifications ribicycl:

• brand: Full Speed Ahead
• mpn: Os-167
• part type: Stem Bar Clamp
• color: Black
• stem type: Threadless
• set includes: Stem
• material: Aluminum
• steerer tube diameter: 1 1/8 In
• california prop 65 warning: Standard
• manufacturer warranty: 2 Years
• clamp diameter: 31.8 Mm
• stem angle: Deg
• compatible bike type: Mountain Bike, Road Bike, Touring Bike, Urban Bike Fixed Gear, Universal, Fitness-/crossbike, Cyclocross Bike
• country of origin: Taiwan
• upc: 840031073648

payments ribicycl:

• other
• wallet: Paypal
• credit card: Diners-club

general ribicycl:

• condition: Used
• Cycling > Bicycle Components Parts > Stems

offer ribicycl:

• quantity: 1
• started: March 28, 2026
• options: Ship-to-home
• availability: In Stock
• sold: 0

returns ribicycl:

• policy: No Returns

shipping ribicycl:

• type: Calculated
• carrier: USPS
• cost: $5.39
• transit: 4-9 Days
• class: Standard
• service: USPS Ground Advantage

seller ribicycl:

• # reviews: 1092
• city: Prior Lake, Minnesota
• rating: 100.0%

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