SURLY FW2086 Single Cogs

( Brand: Surly ), ( Manufacturer Part Number: FW2086 ), ( Freehub/driver Type: Threaded ), ( Color: Silver ), ( Largest Sprocket: 18 Tooth ), ( Compatible Bike Type: Single Speed/fixie, Track Bike ), ( Material: Steel ), ( Number Of Speeds: 1 Speed ), ( Part Type: Cog )

Review SURLY Single Speed Cogs Teeth

The **Surly FW2086 Single Cog Rear Hub** is a meticulously engineered, durable, and versatile component designed for cyclists seeking the simplicity, reliability, and performance of a single-speed or fixed-gear setup. This hub features a **100mm-wide 12mm axle** with a **threaded design**, ensuring a secure and stable fit within most standard dropouts, while its **direct-drive single-speed configuration** eliminates the complexity of derailleurs and cassettes, delivering a direct, responsive, and efficient power transfer from pedal to wheel. The **17, 18, and 20-tooth cog options** provide cyclists with a range of gearing choices, catering to different riding styles, terrains, and rider preferences. A **17-tooth cog** offers a slightly faster cadence, making it ideal for urban commuting, track riding, or smooth pavement where quick, efficient pedaling is key. The **18-tooth cog** strikes a balance, providing a moderate gear ratio that works well for casual riding, light off-road adventures, or those transitioning from multi-speed setups. Meanwhile, the **20-tooth cog** delivers a lower gear, perfect for hill climbing, gravel roads, or riders who prefer a more relaxed pedaling pace. Constructed from **high-quality steel**, the FW2086 is built to withstand the rigors of daily use, whether on pavement, dirt, or urban streets, with a robust design that resists bending and wear. Its **smooth-running bearings** ensure minimal friction, contributing to a quieter ride and reduced maintenance needs. The hub s **threaded axle** allows for easy installation and removal, making adjustments or repairs straightforward, while its compatibility with a wide range of brake systems including rim brakes, disc brakes, and even some hub-mounted options adds to its flexibility. Whether paired with a fixed-gear drivetrain for a direct, engaging ride or a freewheel for a more casual single-speed experience, the Surly FW2086 is a dependable choice for riders who value simplicity, strength, and performance. Its timeless design and rugged construction make it a staple in the single-speed and fixed-gear communities, appealing to both seasoned enthusiasts and newcomers alike.

**Pros and Cons of Buying a Surly FW2086 Single-Speed with 17/18/20 Tooth Cogs**

The Surly FW2086 is a well-regarded, durable, and versatile single-speed bike designed for utility, commuting, and light off-road use. The inclusion of three cogs (17, 18, and 20 teeth) offers some flexibility in gearing, which can be beneficial depending on your riding conditions.

The FW2086 is built with a sturdy steel frame, known for its longevity and resistance to wear. The bike is designed to handle rough terrain, potholes, and daily commuting without frequent maintenance issues. The single-speed drivetrain eliminates the complexity of multiple gears, reducing the risk of mechanical failures.

With a single-speed setup, there are no derailleurs, chains, or shifting mechanisms to adjust or replace. This simplifies maintenance just keep the tires inflated, the chain lubed, and the drivetrain clean. The three cogs (17/18/20) allow for slight gearing adjustments without the need for a full derailleur system, making it easier to adapt to different terrains or riding styles.

The 17/18/20 cogs provide a modest range of gearing options. A smaller cog (17 teeth) is ideal for steep climbs or heavy loads, while a larger cog (20 teeth) works better for flat terrain or faster speeds. This setup can accommodate a variety of riders, from casual commuters to those tackling light hills or rough pavement.

Single-speed bikes are known for their reliability. Without the moving parts of a multi-gear system, there s less chance of derailleur misalignment, chain slippage, or shifting problems. This makes the FW2086 a dependable choice for daily use, especially in urban or suburban environments.

Single-speed bikes are generally more affordable than their multi-gear counterparts, especially when considering long-term maintenance costs. The FW2086 s simplicity also means fewer parts to replace over time, making it a budget-friendly option.

With a single-speed or minimal gearing setup, the FW2086 can be tuned for optimal performance on flat roads. A 20-tooth cog paired with a suitable chainring (if applicable) can provide a smooth, efficient ride for commuting or recreational riding.

---

While the Surly FW2086 with 17/18/20 cogs is a solid choice, there are some limitations to consider.

The three cogs (17/18/20) provide only a narrow range of gearing options. If you frequently ride in hilly or mountainous areas, you may find the smallest cog (17 teeth) insufficient for steep climbs, requiring frequent dismounting or pushing. Conversely, the largest cog (20 teeth) may feel too slow for fast descents or high-speed riding on flat terrain.

While the FW2086 is not a traditional single-speed (which typically uses a single cog and chainring), the three-cog setup adds complexity compared to a true single-speed. You ll need to manually switch cogs, which can be inconvenient, especially if you re used to seamless shifting. This setup is more akin to a fixed-gear or internal-gear hub (IGH) bike with limited options.

The FW2086 is heavier than some lighter single-speed or hybrid bikes due to its steel frame and robust construction. This can make it less agile on technical trails or steep climbs, though it compensates with stability and durability.

With three cogs, the chain and sprockets may wear unevenly if not properly maintained. Frequent shifting between cogs can accelerate wear, especially if the chain isn t lubricated regularly. This could lead to higher long-term maintenance costs compared to a true single-speed.

While the FW2086 is capable of handling light off-road conditions, its single-speed or minimal-gear setup may not be ideal for aggressive trail riding. Riders who frequently tackle rough terrain may prefer a bike with a wider gear range or a more robust drivetrain.

The FW2086 s geometry is designed for utility and stability, which may not suit riders who prefer a more aggressive or nimble riding position. Comfort can also vary depending on the saddle, handlebars, and tire choice. Some riders may find the bike less comfortable for long-distance riding compared to a geared hybrid or touring bike.

---

The Surly FW2086 with 17/18/20 cogs is an excellent choice for riders who prioritize durability, simplicity, and versatility in a utility or commuting bike. Its three-cog setup offers a modest gear range that can handle a variety of conditions without the complexity of a full derailleur system. The bike s steel frame ensures longevity, and its low-maintenance nature makes it ideal for daily use.

However, if you frequently ride in hilly or mountainous areas, the limited gearing may be a drawback. Similarly, riders who prefer a lighter, more agile bike or those who enjoy off-road adventures may find the FW2086 less suitable. The trade-off between simplicity and gearing flexibility is a key consideration this bike excels in reliability and ease of use but sacrifices some adaptability.

---

- You primarily ride on flat or lightly rolling terrain and want a durable, low-maintenance commuting or utility bike.

- You prefer simplicity and don t need a wide range of gears.

- You appreciate the robustness of a steel frame and don t mind a heavier bike for stability.

- You re looking for a versatile bike that can handle light off-road conditions or urban riding without frequent adjustments.

- You frequently ride in hilly or mountainous areas and need a wider gear range.

- You prefer a lighter, more agile bike for trail riding or aggressive commuting.

- You want seamless shifting and are open to a derailleur system or internal-gear hub (IGH).

- You prioritize speed or efficiency on flat terrain and would benefit from a higher gear ratio.

For most casual commuters, urban riders, or those seeking a no-fuss, durable bike, the FW2086 with 17/18/20 cogs is a strong and practical choice. If your riding conditions demand more gearing flexibility, exploring a geared hybrid or a true single-speed bike with a single cog might be worth considering.

Details:

The Surly Single Speed Cogs are high-quality steel cogs designed for single-speed bikes and track. 4 Single Speed Cogs, 17 18 20 and 22 Teeth Cogs.

part #: fw2086 prices

• $44.00-$85.00

specifications ribicycl:

• brand: Surly
• mpn: Fw2086
• freehub/driver type: Threaded
• color: Silver
• largest sprocket: 18 Tooth
• compatible bike type: Single Speed/fixie, Track Bike
• material: Steel
• number of speeds: 1 Speed
• part type: Cog

payments ribicycl:

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

offer ribicycl:

• availability: In Stock
• best offers: True
• started: May 10, 2026
• quantity: 1
• options: Ship-to-home
• sold: 0

shipping ribicycl:

• class: Standard
• service: USPS Ground Advantage
• carrier: USPS
• cost: $5.97
• type: Calculated
• transit: 5-11 Days

seller ribicycl:

• city: Roseville, California
• # reviews: 202
• rating: 99.3%

general ribicycl:

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

returns ribicycl:

• policy: No Returns

Surly FW2086 Is Similar To:

• Fw2078 Surly Tooth Single Speed Cog 708752032149 (60.4% similar) Surly x 20T single speed cog. Built of hardened chorally steel...(April 26th, 2018)
• Surly 708752032132 19 Tooth Single Speed Cog 3 32 Inch X22t Hg Splined Chromoly Steel (45.1% similar) It is a reliable and durable option for cyclists looking to improve their bikes performance. This cog is compatible with 8/9/10 speed shaman road freehub/driver type and has a size of 3/32 X22T. Its solid construction and compatibility with various freehub/driver types make it a versatile option for...(November 19th, 2023)
• Surly 708752032163 Single Cassette Cog 3 32 Inch X22t Splined (49.5% similar) Used with very little use...(August 5th, 2024)
• Surly Ch8899 Singleator Chain Tensioner Silver Single Speed Ss Singlespeed Conversion (37.6% similar) Surly singlet single speed converter...(March 26th, 2025)
• Surly Fw2074 Single Speed Cog 16 Tooth Splined Cassette Hg 3 32 Inch Chromoly Steel (50.4% similar) Manufacturer Surly part number FW2074 UPC 1 model single cogs tooth count 16 cassette body type shaman Hg 7-SPEED drive train speeds speed 3/32 material steel...(April 29th, 2025)