ACS BMX FW1245 Southpaw Freewheel Left Drive Chromoly Lhd 16T Single

( Brand: Acs Bmx ), ( Manufacturer Part Number: FW1245 ), ( Part Type: Hand Drive ), ( Number Of Speeds: 1 Speed ), ( Color: Silver ), ( Compatible Bike Type: Bmx Bike ), ( Material: Steel ), ( Country Of Origin: China )

Review ACS BMX Southpaw Freewheel 16t Left Hand Drive Silver Chromoly Lhd Single Speed

The **ACS BMX FW1245 Southpaw Freewheel** is a meticulously engineered, high-performance component designed for riders seeking precision, durability, and a seamless freewheel experience in their BMX setups. Built with a **left-hand drive (LHD) chromoly steel construction**, this freewheel combines lightweight strength with exceptional responsiveness, making it an ideal choice for aggressive riders who demand reliability under intense conditions. The **16-tooth design** strikes a perfect balance between acceleration and gearing efficiency, allowing for quick bursts of speed while maintaining control during high-speed maneuvers or technical tricks. The **Southpaw configuration** ensures compatibility with left-side drive hubs, catering specifically to riders who prefer or require this orientation, whether for aesthetic preference, mechanical advantage, or simply to avoid chain clashes in certain setups. Engineered with a **smooth, low-friction freewheel mechanism**, this component minimizes wear on both the freewheel and cassette, extending the lifespan of your drivetrain while delivering a buttery-smooth engagement and disengagement during pedaling. The **chromoly steel body** not only reduces weight enhancing pedal response and overall bike agility but also provides superior resistance to bending or fatigue, ensuring consistent performance even after years of rigorous use. Whether you're a competitive BMX racer pushing the limits on the track, a street rider executing complex tricks, or a park enthusiast tackling technical features, the **ACS FW1245** delivers the precision and durability needed to keep up with your demands. Its robust build and thoughtful design make it a standout choice for riders who refuse to compromise on quality or performance.

The **ACS BMX Freewheel FW1245 Southpaw (16t, Left Drive, Chromoly, LHD, Single)** is a high-performance freewheel designed for BMX and freestyle riding. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros**

1. **Durability and Strength**

The freewheel is constructed from **chromoly steel**, a material known for its high tensile strength and resistance to wear. This makes it well-suited for the high-stress demands of BMX riding, including grinding, flipping, and heavy use.

2. **Southpaw Design (Left Drive)**

The **Southpaw (left-hand drive)** configuration is ideal for riders who prefer a counterintuitive pedal placement. This design is popular among BMX riders who want a different feel or are used to it from other bikes. It also allows for easier chain adjustments and maintenance in some setups.

3. **16-Tooth Ratio**

- **Freestyle riding**, where quick pedal turns are often needed for tricks.

- **Better acceleration** when climbing or riding on flat ground.

- **Easier spinning** in technical terrain or when performing wheelies.

4. **Single-Speed Compatibility**

Being a **single-speed freewheel**, it is lightweight and simplifies the drivetrain, reducing maintenance and potential points of failure. This is particularly advantageous for BMX bikes, where simplicity and reliability are key.

5. **High-Quality Bearings**

The freewheel likely features **sealed bearings**, which reduce friction and wear, extending the lifespan of the component. This is crucial for riders who push their bikes hard.

6. **Compatibility with BMX-Specific Needs**

The **LHD (Left-Hand Drive)** designation ensures it fits correctly on BMX bikes, where the chain typically runs on the left side of the crankset. This avoids confusion with road or mountain bike setups.

7. **Brand Reputation**

ACS is a well-known brand in the BMX and freestyle community, with a history of producing reliable components. Their freewheels are often favored by riders who prioritize performance and durability.

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### **Cons**

1. **Limited Gear Options**

As a **single-speed freewheel**, it lacks the ability to shift gears, which may be a drawback if you ever transition to a multi-speed setup (though this is rare for BMX). However, for pure BMX riding, this is not typically an issue.

2. **Potential for Wear Over Time**

While chromoly is durable, **high-impact riding (e.g., grinding on rails, flipping, or heavy use)** can still cause wear on the freewheel s teeth or bearings. Frequent maintenance or replacement may be necessary for heavy riders.

3. **Chain Compatibility**

A **16-tooth freewheel** requires a **short-chain** (typically 1/8" pitch, though BMX chains are usually 1/4" or 3/32"). If you re upgrading from a larger freewheel (e.g., 18t or 20t), you may need to adjust your chain length or buy a new one. This can add to the cost.

4. **Maintenance Requirements**

Like all freewheels, the **ACS FW1245 will require periodic cleaning and lubrication** to prevent rust and ensure smooth operation. Neglecting maintenance can lead to grinding noises, stiffness, or premature failure.

5. **Potential for Chain Stretch**

BMX chains stretch over time due to the high stress placed on them. A 16-tooth freewheel may experience **more chain wear** than larger ratios because the chain wraps around fewer teeth, increasing tension per tooth. This may require more frequent chain replacements.

6. **Cost Relative to Alternatives**

While not extremely expensive, the **ACS FW1245 may be pricier** than basic freewheels from other brands. For riders on a tight budget, cheaper options (e.g., some Chinese-made freewheels) might be considered, though they may lack the same durability.

7. **Learning Curve for Southpaw Setup**

If you re used to a **right-hand drive (RHD) setup**, transitioning to a **Southpaw (LHD) freewheel** may take some adjustment. Pedaling direction and chain tensioning can feel different, which might affect riding comfort initially.

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### **Conclusion**

The **ACS BMX Freewheel FW1245 (Southpaw, 16t, Chromoly, LHD, Single)** is an excellent choice for **BMX and freestyle riders** who prioritize **durability, performance, and a fast pedal ratio**. Its **chromoly construction, Southpaw design, and 16-tooth ratio** make it well-suited for high-impact riding, grinding, and technical tricks. The **single-speed simplicity** also reduces maintenance hassles, which is ideal for BMX setups.

However, it is not without drawbacks. The **16-tooth ratio requires a short chain**, and frequent maintenance is necessary to prevent wear. Additionally, the **Southpaw setup may take some getting used to** if you re accustomed to traditional drivetrains. For riders who push their bikes hard, the **upfront cost and potential for chain/freewheel wear** should be considered.

If you re a **serious BMX rider** who values **speed, durability, and a unique pedal feel**, this freewheel is a strong recommendation. For casual riders or those on a tight budget, a slightly cheaper alternative might suffice, but the ACS FW1245 remains a top-tier option in its category.

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### **Final Recommendation**

- You ride **BMX or freestyle** and need a **durable, high-performance freewheel**.

- You prefer a **fast pedal ratio (16t)** for better acceleration and trick performance.

- You want a **Southpaw (LHD) setup** for counterintuitive pedaling or compatibility with your bike.

- You re willing to **maintain it properly** to ensure longevity.

- You re on a **tight budget** and can find a similarly durable freewheel at a lower cost.

- You re unsure about the **Southpaw setup** and may prefer a traditional RHD freewheel.

- You plan to **transition to a multi-speed setup** in the future (though this is rare for BMX).

Overall, the **ACS FW1245 is a reliable and high-quality choice** for BMX riders who demand performance. With proper care, it will provide years of trouble-free riding.

Details:

Only the single ACS SouthPaw freewheel with retail box shown in photos is included; hub, chain, tools, scale, and any other background items visible pictures are not included. Material and construction: chromoly steel freewheel body with machined teeth internal ratchet mechanism. Freewheel spins and engages with consistent pawl s; listing includes the single ACS SouthPaw freewheel original retail box only, hub, ruler, scale, any other background items visible in photos are not included. And Made in China ; end label shows ACS BMX branding, and MPN FW1245.

ACS SouthPaw BMX Freewheel 16T LEFT Hand Drive Silver Chromoly LHD Single Speed. Box has edge scuffs, creases, small tears at the flaps, label wear, and sticker residue from storage handling. Part type: BMX single speed freewheel with left-hand drive orientation for use on compatible threaded rear hubs. Tooth count: 16T single sprocket for 1-speed drive trains.

Compatibility: designed for left-side drive setups and fits both 1/8 3/32 single-speed chains. Used ACS SouthPaw chromoly single speed freewheel with cosmetic wear from prior BMX installation and riding. ACS SouthPaw chromoly single speed freewheel for left-side drive BMX bikes. Color and finish: silver/grey steel finish with machined tooth faces a knurled outer rim.

Teeth show chain wear, light rounding, and surface scratches, the body has small nicks, finish rubs, discoloration, residual grease dirt in threads around seals.

part #: fw1245 prices

• $29.69-$33.66

specifications ribicycl:

• brand: Acs Bmx
• mpn: Fw1245
• part type: Hand Drive
• number of speeds: 1 Speed
• color: Silver
• compatible bike type: Bmx Bike
• material: Steel
• country of origin: China

returns ribicycl:

• policy: Returns Accepted
• time: 60 Days
• method: Money back
• paid by: Seller

seller ribicycl:

• rating: 100.0%
• # reviews: 33122
• city: Neenah, Wisconsin

payments ribicycl:

• wallet: Apple-pay
• credit card: Discover
• other

general ribicycl:

• condition: Used
• Cycling > Bicycle Components Parts > Cassettes, Freewheels Cogs

shipping ribicycl:

• transit: 2-6 Days
• class: Standard, Expedited
• cost: $5.95
• service: Standard, Expedited
• type: Fixed

offer ribicycl:

• started: March 31, 2026
• options: Ship-to-home
• best offers: True
• sold: 0
• availability: In Stock
• quantity: 1

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