Clipping into an indoor cycling bike means using cycling shoes with cleats that mechanically engage with compatible pedals. Compared with riding in athletic shoes on flat pedals, a clip-in system creates a more consistent connection between your foot and the bike.
For indoor cycling, two common SHIMANO systems are SPD and SPD-SL. The right choice depends on your shoes, your bike or studio's pedals, and whether you prioritize walkability or a road-style cleat interface.
SPD vs. SPD-SL at a glance:
- SPD: Two-bolt cleat, typically recessed into the shoe, easier to walk in.
- SPD-SL: Three-bolt road-style cleat with a larger pedal interface.
- For studio riders: Check which pedal system your studio uses before buying shoes or cleats.
- For home riders: Match the shoes and cleats to the pedals installed on your indoor bike.
What Does "Clipping In" Mean?
Cycling shoes can be fitted with cleats that attach to the bottom of the shoe. Those cleats engage with a compatible pedal and hold the shoe in a consistent position while you ride.
To disengage from most SHIMANO clip-in systems, the rider rotates the heel outward to release the cleat from the pedal.
The terminology can be confusing because these systems are often called "clipless" pedals even though riders still say they're "clipping in."
The word "clipless" comes from older toe-clip pedals that used cages and straps around the rider's shoe. Modern cleat-and-pedal systems eliminated those traditional toe clips.
What Are the Benefits of Clipping Into an Indoor Bike?
A clip-in system creates a stable connection between your shoe and pedal, which can help keep your foot in a consistent position throughout the ride.
Cycling-specific shoes also tend to use more supportive soles than typical athletic shoes, creating a stable platform against the pedal during harder efforts.
Together, the shoe, cleat, and pedal function as a system designed to provide a secure and predictable connection while riding.
What Is SHIMANO SPD?
SPD, or SHIMANO PEDALING DYNAMICS, is SHIMANO's two-bolt clipless pedal and cleat system. Originally developed for off-road cycling, SPD has also become a popular option for indoor cycling.
An SPD cleat attaches to the shoe using two bolts and is typically recessed within the outsole of compatible cycling shoes.
Why Is SPD Popular for Indoor Cycling?
One of SPD's biggest advantages indoors is walkability.
Because the cleat is smaller and can sit within a recessed section of the shoe, the surrounding rubber outsole can contact the floor when you walk.
That can make it more practical for moving through studios, locker rooms, gyms, or home workout spaces before and after class.
Learn more about SHIMANO SPD pedals and cleats.
What Is SHIMANO SPD-SL?
SPD-SL is SHIMANO's three-bolt road cycling pedal and cleat system.
Rather than using the smaller two-bolt SPD cleat, SPD-SL uses a larger three-bolt cleat and broad pedal interface.
Although the system was developed for road cycling, it can also be used for indoor training when the bike or studio pedal is compatible.
How Is SPD-SL Different From SPD?
The most obvious differences are cleat size, bolt pattern, pedal interface, and walkability.
SPD-SL uses a larger exposed cleat, which provides a broad interface with the pedal but is less convenient for walking than a recessed SPD setup.
If you plan to use SPD-SL indoors, take extra care when walking across hard or potentially slippery studio floors.
Explore SHIMANO SPD-SL pedals and cleats.
SPD vs. SPD-SL for Indoor Cycling
Choose SPD if you prioritize:
- Easier walking before and after class.
- A smaller, recessed two-bolt cleat.
- Indoor shoes designed around a rubber walking outsole.
- A pedal system commonly used across indoor and off-road cycling.
Choose SPD-SL if you prioritize:
- A road-style three-bolt cleat.
- A broad shoe-to-pedal interface.
- Using a system that matches your outdoor road bike.
- A studio or indoor bike that specifically uses a compatible three-bolt pedal setup.
Do All Indoor Cycling Shoes Fit Both Cleat Systems?
No. Always check the bolt pattern on the shoe before buying cleats.
Many cycling shoes are designed for either:
- 2-bolt cleats: Used by SPD.
- 3-bolt cleats: Used by SPD-SL and other road-style systems.
Some indoor cycling shoes support both two-bolt and three-bolt mounting patterns, but this should never be assumed.
Before buying shoes, cleats, or pedals, confirm all three parts of the system are compatible.
How Do You Know Which Cleats Your Indoor Cycling Studio Uses?
If you're buying shoes for a studio class, check the pedal system before ordering your cleats.
Studio bikes can use different pedal configurations, and some pedals may even offer more than one type of interface.
Before buying indoor cycling shoes:
- Ask your studio which cleat system its bikes use.
- Check whether the shoe uses a 2-bolt, 3-bolt, or dual-compatible mounting pattern.
- Buy the cleat that matches both the pedal and shoe.
- Have the cleats installed and adjusted before your first ride.
Which Indoor Cycling Pedal and Cleat System Is Right for You?
Start with compatibility.
If your studio or home bike uses SPD, choose a compatible two-bolt shoe and SPD cleat. If your bike uses SPD-SL, you'll need a shoe with the appropriate three-bolt mounting pattern and a compatible cleat.
Once compatibility is covered, consider how much walking you do, whether you also ride outdoors, and which shoe style feels best on your foot.
- You want easier studio walkability: Consider SPD.
- You already use SPD outdoors: Staying with SPD can simplify your setup.
- You already use SPD-SL on your road bike: SPD-SL may provide a familiar setup indoors.
- Your studio requires a specific cleat: Choose the system compatible with its pedals.
Clipping in can feel unfamiliar at first, but with the correct shoes, cleats, and pedal setup, the engagement and release motion quickly becomes part of the riding routine.
The key is matching the entire system: shoe, cleat, and pedal.
