This review dives into the performance of the Shimano SM-SH51 cleat and PD-M520 pedal combination, specifically within the context of daily commuting. We explore the practicality and reliability of this matched set, focusing on its suitability for urban riding and its ability to withstand various weather conditions. The double-sided design of the SM-SH51 cleat is examined for its ease of use in frequent on-and-off situations, a critical aspect for commuters. The review also delves into the cleat's adjustability, focusing on how this feature contributes to comfort and efficient power transfer.Beyond the ease of use, we assess the durability and longevity of the SM-SH51, considering its susceptibility to wear and tear from exposure to the elements and road conditions. A comparison with the alternative SM-SH56 cleat, offering a multi-directional release, is also included to provide a broader perspective on Shimano's cleat options and their respective benefits for different riding styles and needs. Ultimately, this review aims to provide a comprehensive assessment of the SM-SH51 and PD-M520's suitability for the demands of daily commuting.
Pros And Cons
- Provides a secure and solid connection for power transmission.
- Works well in all weather conditions (rain, snow, varying temperatures).
- Cleat is adjustable fore/aft, left/right, and up/down.
- Consistent clipping and releasing force.
- Cleat is unidirectional release (only releases in one direction), requiring careful planning and practice.
- Cleat is made of mild steel and prone to rust in harsh weather conditions.
- Requires specific torque tightening of bolts to avoid issues with unclipping.
- Cleat can be noisy and slippery when walking on certain surfaces (hardwood, tile).
Read more: 5 Best Child Bike Pedals for Smooth Rides
Cleat and Pedal Compatibility
The Shimano SM-SH51 cleat and PD-M520 pedal are a matched set. This means you're limited to using only Shimano components, and specific pedal models work only with certain cleat shapes. There's no mix-and-matching with other brands or cleat designs.
The SM-SH51 is a double-sided cleat, allowing for easy entry from either side. This is a significant advantage for commuting, where quick and efficient clipping in and out is crucial. Shimano also offers an alternative SM-SH56 cleat, offering different release characteristics, but it is presented as a separate accessory.
This specific review focuses solely on the SM-SH51 and PD-M520 combination, assessing its performance in the context of daily commuting.
Commuting Performance and Weather Resistance
My experience with the SM-SH51 and PD-M520 is primarily in commuting across various weather conditions. The secure connection provided by this system is excellent for transmitting power efficiently during my rides.
The cleat has held up remarkably well through rain, snow, and temperature fluctuations. The grip remained consistent in all of these conditions, demonstrating superior weather resistance.
Frequent clipping in and out at intersections is seamless, making the SM-SH51 a reliable and practical choice for daily urban commutes.
Cleat Adjustability and Features
The SM-SH51 cleat offers four-way adjustability: fore/aft, and lateral positioning. This allows for fine-tuning to match individual foot and leg biomechanics for optimal comfort and power transfer.
The fore/aft adjustment helps accommodate different shoe designs and personal preferences. Lateral adjustment provides a personalized fit and potentially helps in avoiding toe strike, especially important with fenders and a narrow wheelbase.
These adjustments are easily made using the included Allen key and should be done to the specified torque to avoid loosening.
Durability and Wear
The SM-SH51 cleat is made of mild steel and is more susceptible to wear and tear compared to the hardened steel of the pedals. Road salt and regular contact with concrete can accelerate corrosion.
While minor rust is expected, consistent monitoring is vital to avoid significant damage or failure, ultimately affecting safety. The powder coating is quickly worn off in everyday use.
Regular inspection and timely replacement when necessary are crucial, given the cleat's role in securing the rider’s foot.
Comparison with SM-SH56 Cleat and Conclusion
The Shimano SM-SH56 cleat offers a multi-directional release, unlike the unidirectional SM-SH51. This provides more flexibility for quick disengagement in various situations, including sudden stops or unexpected obstacles.
The SM-SH56 may be more advantageous for riders who prioritize a quicker, more versatile release mechanism, particularly during aggressive acceleration or climbing, offering hamstring assistance.
For my commuting needs, the SM-SH51's secure connection and ease of single-directional release are preferable, but the SM-SH56 might be a better choice for others.
