How to Use SHIMANO SM-SH41 Cleat Adapters
The SHIMANO SM-SH41 Cleat Adapter allows a compatible cycling shoe with a 3-hole SPD-SL mounting pattern to use a 2-bolt SHIMANO SPD cleat. It is useful for riders who prefer road-style cycling shoes but need compatibility with SPD pedals.
This can be especially helpful for indoor cycling, commuting, or riders who want to use an SPD pedal system without changing to a dedicated 2-bolt shoe.
SM-SH41 at a glance:
- Converts cleat compatibility: Allows compatible 3-hole shoes to accept 2-bolt SPD cleats.
- SPD compatible: Designed for use with SHIMANO SPD pedals.
- Compatible cleats: SHIMANO SM-SH51 and SM-SH56.
- Hardware included: Adapter mounting hardware is supplied with the kit.
- SPD cleats sold separately: Select the appropriate cleat for your SPD setup.
What Is the SHIMANO SM-SH41 Cleat Adapter?
The SM-SH41 is an adapter that mounts to the three-bolt cleat interface on a compatible cycling shoe and creates a mounting platform for a two-bolt SPD cleat.
In simple terms, it lets a shoe designed around a road-style three-bolt mounting pattern work with an SPD pedal system.
The adapter does not convert an SPD pedal into SPD-SL or change how the pedal functions. It changes the cleat mounting interface on the shoe.
Explore the SHIMANO SM-SH41 Cleat Adapter.
What Problem Does the SM-SH41 Solve?
Cycling shoes and pedals do not all use the same cleat mounting standard.
- SPD: Uses a compact two-bolt cleat.
- SPD-SL: Uses a larger three-bolt road cleat.
A shoe with only a three-bolt mounting pattern normally cannot accept a two-bolt SPD cleat directly.
The SM-SH41 bridges those two mounting standards by attaching to the three-bolt shoe interface and providing the hardware needed to mount a compatible SPD cleat.
Learn more about SHIMANO SPD and SHIMANO SPD-SL.
When Would You Use an SM-SH41 Adapter?
The adapter can be useful whenever you want to combine a three-bolt cycling shoe with an SPD pedal system.
Common examples include:
- Your cycling shoes use a three-bolt mounting pattern, but your bike has SPD pedals.
- Your indoor cycling studio uses SPD pedals.
- You prefer the fit of a particular road-style cycling shoe but want to use SPD.
- You want to change pedal systems without immediately replacing your compatible cycling shoes.
Which SPD Cleats Work With SM-SH41?
SHIMANO specifies the following SPD cleats for use with the SM-SH41 adapter:
- SM-SH51
- SM-SH56
The SPD cleat itself is sold separately from the adapter.
Cleat engagement and release characteristics depend on the cleat and pedal combination, so always follow the instructions for the specific SPD components you are using.
How Do You Install the SM-SH41 Cleat Adapter?
Installation involves two main stages: first mounting the adapter to the three-bolt shoe, then mounting the SPD cleat to the adapter.
1. Position the Adapter on the Shoe
Place the SM-SH41 adapter against the bottom of the compatible shoe so its three mounting points align with the shoe's three-bolt cleat interface.
The adapters can be used on either the left or right shoe.
2. Position the SPD Cleat
Place the compatible SPD cleat over the two-bolt mounting interface on the adapter.
Install the appropriate cleat hardware supplied for the adapter system. Make sure the washers, bolts, and mounting components are oriented according to SHIMANO's installation instructions.
3. Adjust Cleat Position
Before fully tightening the cleat, adjust its fore-aft position within the available range to suit your setup.
If you are unsure where to position your cleats, an experienced bike fitter or bicycle dealer can help establish a starting point.
4. Tighten to the Specified Torque
SHIMANO specifies a tightening torque of 5-6 Nm (44-52 in. lb.) for the relevant SM-SH41 cleat mounting hardware.
Use a torque wrench and the correct tools for the supplied hardware rather than tightening by feel.
Always reference the current SHIMANO installation instructions supplied with the adapter before installation.
Does the SM-SH41 Make a Road Shoe Walk Like an SPD Shoe?
The adapter adds platforms around the SPD cleat that can provide additional ground contact and help protect the cleat and flooring.
However, the underlying cycling shoe is still a three-bolt shoe and may have a stiff, road-oriented sole.
That means a converted shoe will not necessarily feel the same to walk in as a purpose-built SPD shoe with a deeply recessed cleat and full rubber outsole.
If frequent walking is a major priority, a dedicated SPD shoe may still be the better option.
Does the SM-SH41 Change How SPD Pedals Work?
No.
Once the correct SPD cleat is installed, engagement and release are controlled by the SPD cleat and pedal mechanism.
The SM-SH41 simply provides the mounting interface that allows that cleat to be installed on a compatible three-bolt shoe.
Spring tension, cleat release characteristics, and pedal adjustment should still be handled according to the instructions for the SPD pedal and cleat you are using.
Is SM-SH41 the Same as a 5-Hole Outsole?
No. They solve a similar compatibility problem in different ways.
- 5-hole outsole: The shoe itself contains both 2-bolt and 3-bolt mounting provisions.
- SM-SH41 adapter: Adds a 2-bolt SPD mounting interface to a compatible three-bolt shoe.
In some SHIMANO footwear applications, an adapter may still be required to mount a two-bolt cleat even when the outsole is designed for multiple cleat standards.
Who Should Use an SM-SH41 Cleat Adapter?
SM-SH41 may be useful if:
- You own compatible three-bolt cycling shoes but need to use SPD pedals.
- Your indoor cycling studio uses SPD.
- You want to retain a road-style shoe while changing pedal systems.
- You need a SHIMANO-supported way to mount an SPD cleat to a compatible three-bolt shoe.
Riders purchasing new footwear specifically for frequent SPD use may also want to compare a purpose-built two-bolt SPD shoe before deciding which setup best matches their needs.
Understanding the SHIMANO SM-SH41 Adapter
The SM-SH41 has one specific job: allowing a compatible three-bolt cycling shoe to accept a two-bolt SHIMANO SPD cleat.
It does not change SPD pedal technology or turn the shoe into a dedicated SPD shoe. It simply provides the mounting interface needed to connect the two systems.
Install the adapter with the supplied hardware, use a compatible SHIMANO SPD cleat, follow the specified torque values, and confirm engagement and release before riding.
