Shimano
Single Freewheel Sprocket - SF-MX30
Best reliable upgrade for single-speed bike enthusiasts.
Upgrade your ride with the Shimano SF-MX30 Single Freewheel Sprocket. This reliable component offers customizable gearing with available tooth counts of 16T, 17T, and 18T. Choose between a classic CP or a sleek Black finish to complement your bike's style. Engineered with Shimano's renowned quality, this freewheel sprocket ensures smooth integration and dependable performance for your single-speed setup. It's designed for seamless drivetrain integration, providing a durable and efficient solution for an improved cycling experience.
$48.00
Owner Satisfaction
4.7
/ 5
Category Rank
68
/ 2100
#68 in Components
Price vs Category Average
-53%
Below average
Model Number
3017
/ ISFMX
Who it's for
- Aggressive riders needing components that withstand heavy impacts
- Competitive cyclists requiring instant power transfer for quick starts
- Performance riders prioritizing smooth operation and long-term reliability
Who should skip it
- Budget-conscious builders looking for affordable drivetrain options
- Weight-focused racers seeking to minimize rotational mass
- Mechanics who prefer repairing components rather than replacing them
Performance breakdown
Engagement reliability
Consistent, instant engagement provides confidence during every pedal stroke.
Durability
Rugged construction handles the high torque demands of single-speed riding.
Drivetrain compatibility
Integrates seamlessly with standard single-speed hubs and chain setups.
Gearing versatility
Three tooth options cover the most common single-speed gear ratios.
Finish resilience
Both finish options resist corrosion and maintain a clean aesthetic.
Installation ease
Standard threading makes swapping or upgrading your drivetrain straightforward.
Key Specs
Model Number
ISFMX3017
Available Sizes
16T, 17T, 18T
Finish Options
CP or Blk
Features
- Reliable single-speed gearing
- Multiple tooth count options
- Choice of CP or Black finish
- Designed for drivetrain integration
- Shimano quality assurance
- Enhances cycling performance
- Customizable gearing setup
- Durable construction
What customers say
The Shimano SF-MX30 freewheel earns high praise for its exceptional durability and robust construction, making it a top choice for demanding BMX and urban riders. Customers consistently report that this component significantly outlasts less expensive options, offering excellent long term value despite a slightly higher initial cost. The engagement mechanism is frequently noted for being smooth, reliable, and quiet, enhancing the overall ride quality immediately. Installation is straightforward, fitting standard hubs easily. While heavy use eventually causes minor wear, the consensus is clear: the SF-MX30 delivers superior performance and longevity, establishing it as a trusted, high performance staple for serious cyclists seeking dependable operation.
Know before you buy
The CP (Chrome Plated) finish offers a classic, shiny metallic look that is highly resistant to corrosion. The Black finish provides a more understated, stealthy aesthetic for your drivetrain.
The tooth count determines your gear ratio. A 16T sprocket will provide a harder gear for higher top speeds, while an 18T sprocket makes pedaling easier, especially when climbing hills or accelerating from a stop.
Yes, the SF-MX30 is designed to fit standard threaded single-speed hubs. It is a direct replacement for most standard BMX and single-speed freewheels.
Yes, you will need a standard freewheel removal tool to properly thread the sprocket onto your hub and secure it. It is recommended to use a tool specifically designed for Shimano-style freewheels to prevent damage during installation.
This sprocket is optimized for 1/8-inch single-speed chains. While it may accommodate some wider chains, it is not designed for the narrower chains used on multi-speed derailleur systems.
Still have a question?
Ask Hayley anything about this product before you decide.
Ready to buy?
$48