Body Geometry Cleat Stacker: FAQs for Cyclists
By Specialized Retail AU | Published: 2026-10-25
Category: Product Reviews
Get answers to common questions about the Body Geometry Cleat Stacker. Learn how to use cleat shims for leg length correction and pedal stack adjustment.
Quick Answer
The Body Geometry Cleat Stacker is a 3mm shim that corrects leg length inequality by lifting the cleat on the shorter leg, improving pedaling symmetry and comfort.
Why Leg Length Matters for Cyclists
A small difference in leg length—often just a few millimeters—can cause hip tilt, knee pain, and uneven power transfer. Many riders don't realize they have this imbalance until they experience discomfort on longer rides. The Body Geometry Cleat Stacker addresses this directly at the pedal interface, which is a simple and effective adjustment point.
Compatibility Considerations
The stacker is shaped to fit SPD SL, Look KEO, and Speedplay pedals, but it may not work with every cleat system. If you use a different pedal brand, check the shape of your cleat base before purchasing. The package includes longer screws to accommodate the added thickness, so you won't need to source hardware separately.
Cleat Stacker FAQ
- What does the Body Geometry Cleat Stacker do?
- It adds 3mm of lift under your cleat to compensate for a shorter leg, helping align your hips and reduce strain on your lower back and knees.
- How do I know if I need a cleat stacker?
- If you experience hip drop, knee pain on one side, or feel like one leg works harder than the other, a simple leg length measurement by a bike fitter or physio can confirm the imbalance. The stacker is only needed if the difference is about 3mm or more. Have your leg length measured before buying to ensure the 3mm correction is appropriate.
- Can I stack multiple stackers for more lift?
- The package includes two 3mm stackers, but stacking them is not recommended because the longer screws may not provide enough thread engagement, and the cleat interface may become unstable. For larger corrections, consult a professional bike fitter. Stick to a single stacker per shoe unless advised otherwise by a fitter.
- Will the stacker affect my pedal feel or float?
- The stacker sits between the cleat and the shoe sole, so it does not alter the cleat's engagement with the pedal. Your float and release angle remain the same. The only change is a slightly higher foot position on that side.
- How do I install the cleat stacker?
- Remove your cleat, place the stacker between the cleat and the shoe sole with the shaped side matching your cleat profile, then reattach using the included longer screws. Tighten to the same torque as your normal cleat installation. Use a torque wrench if your cleats have a specified torque value to avoid over-tightening.
Product Details
- Body Geometry Cleat Stacker – 2-Pack: These 3mm stackers can easily correct the common issue of leg length inequality. External cleat lift for addressing leg length inequality. Shaped to fit SPD SL; Look KEO; and Speedplay pedals. Includes longer screws. Package includes two cleat stackers. You get two stackers in one pack, so you can install them on both shoes or keep a spare for another bike.
Body Geometry Cleat Stacker – 2-Pack
