Single Cassette Cog (7-Speed)
Best durable cog for custom 7-speed drivetrain builds.
Customize your ride or replace a worn component with this versatile single cassette cog from Surly. Engineered specifically for reliable performance within 7-speed drivetrains, this cog offers cyclists precise control over their gearing setup. Whether you are building a unique single-speed conversion or fine-tuning your existing setup, this durable component provides the necessary flexibility. It is available in popular tooth counts to match various riding styles and terrain demands, ensuring you have the right gear ratio when you need it most.
$34.99
Owner Satisfaction
4.5
/ 5
Category Rank
671
/ 2100
#671 in Components
Price vs Category Average
-66%
Below average
Compatibility
7
/ -Speed Drivetrains
Who it's for
- Commuters and bikepackers prioritizing long-term drivetrain reliability
- Mechanics looking for simple single-speed drivetrain conversions
- Singlespeed riders seeking precise, efficient chain alignment
Who should skip it
- Budget-conscious cyclists comparing total conversion kit costs
- Weight-weenies chasing every gram of rotational savings
- Shoppers wanting an all-in-one, ready-to-install solution
Performance breakdown
Material Durability
Hardened steel construction withstands high torque and resists premature tooth wear.
Drivetrain Compatibility
Precision engineering ensures seamless integration with standard 7-speed drivetrain systems.
Installation Simplicity
Straightforward design allows for quick swaps during routine maintenance or upgrades.
Gear Ratio Versatility
Essential for fine-tuning cadence, though limited by specific tooth count availability.
Shift Precision
Clean tooth profiles promote consistent chain engagement and reliable power transfer.
Component Longevity
Built to endure harsh riding conditions without sacrificing structural integrity.
Key Specs
Compatibility
7-Speed Drivetrains
Available Teeth Options
16T
Available Teeth Options
21T
Brand
Surly
Model Number
FW2074
Features
- Optimized for 7-speed drivetrains
- Enables custom gear ratio building
- Direct replacement for single cogs
- Built for lasting durability
- Adaptable for gearing adjustments
- Available in multiple tooth options
What customers say
Customers overwhelmingly value the Surly Single Cassette Cog for its exceptional durability and reliability. Reviewers consistently praise the robust construction, noting the high quality steel ensures longevity even under tough riding. This component is a favored choice for building dependable drivetrains, whether for single speed conversions or as a reliable replacement part. While the initial cost is higher than generic options, users feel the superior craftsmanship justifies the investment, offering significant peace of mind. The precise tooth profile promotes smooth chain engagement and quiet operation. This cog strongly appeals to discerning cyclists prioritizing lasting quality, cementing its status as a top tier, highly recommended component.
Know before you buy
Yes, this Surly cog is specifically engineered to integrate with 7-speed drivetrain systems, making it a reliable choice for replacements or custom builds.
While this cog is designed for 7-speed systems, it can be used in single-speed conversions provided you have the appropriate spacers and chainline alignment tools to ensure the chain stays centered.
This Surly cassette cog is currently available in 16T and 21T options, allowing you to choose the gear ratio that best suits your terrain and riding style.
Yes, it functions as a direct replacement for individual cogs within a compatible 7-speed cassette, helping you extend the life of your drivetrain without replacing the entire assembly.
Surly manufactures these cogs with high-grade materials designed to withstand the torque and wear associated with regular cycling, ensuring long-term performance and consistent shifting.
Still have a question?
Ask Hayley anything about this product before you decide.