How To Adjust Bike Pedal Float With Cleat Shims

A good clipless pedal setup should let your foot rotate naturally while keeping the knee, ankle and hip tracking comfortably through the pedal stroke. When the cleat position is wrong, even a small mismatch can create pressure around the kneecap, Achilles tendon, hips or the outside of the foot.

Cleat shims are thin plates fitted between a cycling shoe and its cleat. They can correct a lack of clearance, fine-tune stance width and alter the effective position of the foot over the pedal axle. They are useful for solving alignment problems, but they do not directly replace the float mechanism inside a pedal or cleat.

This distinction matters when adjusting road pedals, mountain bike pedals or commuter clipless systems. A shim can make the available float feel different because it changes the shoe’s height and angle relative to the pedal, yet the actual float range still comes from the cleat and pedal design. A careful, measured setup is safer than adding layers until the movement feels different.

Understand What Pedal Float Means

Pedal float is the controlled side-to-side rotation allowed while the cleat remains engaged. It lets your heel and foot find a natural angle during each revolution. Some riders prefer generous float for comfort, while others want a more fixed connection for sprinting or racing.

Float is determined mainly by the cleat and pedal combination. Shimano SPD-SL yellow cleats, for example, provide a moderate amount of angular movement, while blue and red versions offer less or no free movement depending on the model. Look, Wahoo Speedplay and mountain bike systems use different cleat designs and adjustment methods, so parts should not be mixed casually.

The pedal’s release-tension screw controls how much force is needed to unclip. It does not normally increase the angular float range. Turning the tension down may make disengagement easier, but it will not correct a cleat that is rotated too far inward or outward.

A cleat shim sits beneath the cleat and raises the shoe slightly. This can prevent the sole, tread or cleat surround from touching the pedal body before the mechanism reaches its intended position. It may also provide a small lateral change if the shim is designed for that purpose, but a flat shim should not be confused with a wedge.

Select Compatible Cleat Shims

Start by identifying the pedal system and the number of bolts on the shoe. Road systems such as Shimano SPD-SL and Look generally use three-bolt cleats, while Shimano SPD mountain bike pedals use a two-bolt recessed cleat. Speedplay pedals use their own four-hole cleat arrangement, although some shoes need an adaptor plate.

Use a shim made for that system whenever possible. Shimano, Look, Wahoo and specialist cycling-fit brands produce compatible plates, and many Australian bike shops keep common road cleat shims in stock. A shim that is too large can interfere with the pedal body; one with poorly placed holes can prevent the cleat from seating flat.

Check the bolt length before installation. Adding a 1 mm or 2 mm plate reduces the amount of thread entering the shoe insert, so longer replacement bolts may be required. The bolts must still engage cleanly without bottoming out inside the shoe. Never force a longer bolt into a shallow insert, as it can damage the sole or the threaded hardware.

A flat shim increases stack height. A wedge changes the tilt of the cleat and is normally used to address varus or valgus alignment. If the aim is simply to create clearance or fine-tune shoe height, begin with a flat shim. Use wedges only with a clear reason, ideally after a professional bike fit.

Set The Cleat Position Before Fine Tuning

Remove the old cleat, clean the sole and inspect the threaded inserts. Dirt, dried mud and worn plastic can prevent the cleat from sitting evenly. On an Australian commuter bike, grit from shared paths or fine dust from unsealed shoulders can collect around the cleat hardware, so a small brush and rag are worthwhile.

Place the shim against the shoe, align the holes and install the cleat over it. Apply a small amount of medium-strength threadlocker only if the cleat manufacturer permits it. Tighten the bolts evenly in a criss-cross pattern, then use a torque wrench set to the shoe or cleat maker’s specification. Many cycling cleat bolts sit in the 4–6 Nm range, but the printed instructions take priority.

Begin with a neutral position. Set the cleat so the ball of the foot is approximately over, or slightly behind, the pedal axle, with the shoe pointing in line with the foot. Mark the original cleat outline with a pencil or paint marker before moving anything. This gives you a reference if the new setup produces discomfort.

Make one change at a time. If the heel is forced inward, rotate the cleat slightly so the foot can rest in a more natural position. If the knee moves excessively inward or the shoe rubs the crank, a small lateral adjustment may help. Do not use a shim to compensate for a major leg-length difference or a pronounced alignment issue without professional assessment.

Test Float On The Road

After fitting the shim, engage and release the pedal while holding the bike securely. Check that the cleat clicks fully into place and that the release motion feels consistent on both sides. The shoe should not rock on the pedal, and the cleat should not contact the pedal body before engagement is complete.

Start with a short, easy ride near home. A quiet bike path or low-traffic suburban street is preferable to a long training ride. Australian riders commuting through Sydney or Melbourne often clip in at intersections, so practise releasing one foot early and choosing a reliable side before riding in traffic.

Pay attention to the complete movement of the leg rather than focusing only on the shoe. Your heel should be able to rotate within the available float without forcing the knee to follow an unnatural path. Watch for hot spots under the forefoot, clicking from a loose cleat, unusual knee pressure or difficulty releasing under load.

If discomfort appears, stop and record what changed. A shim may have solved sole interference but raised the foot enough to alter saddle height or leg extension. A thicker shim can require a small saddle adjustment, although it is better to confirm the cause before changing several contact points together.

Maintain The Setup For Australian Riding

Rain, road grime and sweat can work into cleat hardware. This is especially relevant after wet rides in Brisbane, Sydney or other coastal areas where moisture and road spray can accelerate corrosion. Rinse mud away with clean water, dry the shoes and inspect the bolts regularly. Avoid directing a high-pressure hose at the pedal bearings or shoe fittings.

Clipless pedals are common on performance road bikes, while two-bolt SPD systems remain popular with commuters, gravel riders and cyclists who walk frequently. The Australian market has broad access to replacement cleats through local bike shops and online retailers, but model names can look similar. Match the exact pedal generation and cleat colour before ordering.

Helmets are compulsory for cyclists on public roads and paths throughout Australia under state and territory road rules. A helmet does not affect cleat float, but it reinforces the need to test equipment changes away from traffic and to keep reliable control during an emergency stop. Clipless pedals should never make it harder to put a foot down quickly.

Use metric torque tools where available and keep the product instructions with the bike. Australian Consumer Law may assist when a new cleat, pedal or shim is faulty, but normal wear, incorrect installation and damaged shoe inserts are generally not manufacturing defects. Keep receipts and photographs if a component fails prematurely.

Workshop Checklist For A Reliable Adjustment

The following checks make cleat-shim installation more repeatable and reduce the chance of chasing several alignment problems at once:

A shim is successful when it solves a specific problem without creating another. If the cleat still binds, the foot feels tilted, or the knee remains painful after small adjustments, stop adding spacers. A qualified bike fitter can assess leg alignment, shoe shape, saddle height and pedal stance together rather than treating the cleat in isolation.

Recheck the setup after several rides because plastic cleats bed into the sole and bolts can settle. Replace cleats when the release becomes inconsistent, the engagement feels loose or the walking surfaces are heavily worn. Fresh cleats often restore the original float more effectively than repeated tension adjustments.

Fit the correct shim, set the cleat neutrally, confirm the specified torque and test the result on a quiet ride before returning to busy roads or hard training. That method gives your pedals the freedom to move with your natural leg path while keeping the connection secure and predictable.