How-toRepair the Boa twist lock yourself

Stefan Frey

 · 13.12.2024

Is your Boa fastener defective? Then the shoe is far from ready for the bin. The repair is very simple
Photo: Stefan Frey

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The Boa twist lock is as simple as it is ingenious: bike shoes can be quickly closed and finely adjusted by turning the plastic wheel. However, the practical wheels are more susceptible to dirt than shoelaces and can break off if they come into contact with rocks. However, thanks to a lifetime guarantee and spare parts supply, you can quickly repair them yourself. We show you how to do it.

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It had all started so beautifully as I worked my way up through the glowing red and gold South Tyrolean autumn forest towards the "Stoanerne Mandln". Once above the tree line, the relaxed forest path turned into a technically challenging climb, where I manoeuvred my bike over dog-high stone steps and navigated my way past metre-high boulders.

Everything was still good here - the view was phenomenal and the hold in the shoe was bombproof thanks to the Boa fastenerPhoto: Stefan FreyEverything was still good here - the view was phenomenal and the hold in the shoe was bombproof thanks to the Boa fastener

Unfortunately, it happened at a tight bend. My right foot got caught, a soft crack and the tension on my shoe was gone. Just like the dial on the Boa fastener. Velcro and adhesive tape had to save the rest of the tour.

Bang! A quick contact with the rock and it was gone, the twist lock. From here on, the Velcro and adhesive tape held it in placePhoto: Stefan FreyBang! A quick contact with the rock and it was gone, the twist lock. From here on, the Velcro and adhesive tape held it in place

Lifetime guarantee on defective parts

Fortunately, you don't have to discard your bike shoes with defective Boa wheels straight away, because the company from the Rocky Mountains offers replacements - free of charge, for life. Simply contact the manufacturer on the website, upload a photo of the defect and a few days later you will receive a letter in the form of a warranty kit. If a repair at home is not possible, the manufacturer states that customer service can replace any Boa system - no matter how old it is.

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For cycling shoes, the simpler L6 and the higher-quality Li2 system are usedPhoto: Stefan FreyFor cycling shoes, the simpler L6 and the higher-quality Li2 system are used

Different fastening systems are used in the bicycle sector. That's why it's important to get the right replacement kit for your shoe. In my case, it is an L6 fastener, which only allows adjustment in one direction. The higher quality Li2 fasteners, for example, can be fine-tuned in both directions.

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>> Are you still looking for the right MTB shoes for trail adventures and enduro rides? We have tested six current models - with and without Boa fasteners - here.


These parts are included in the set

In addition to the two Boa wheels for the left and right side, the set includes two new laces and a small metal lever that can be used to remove the defective fastener and serves as a template for cutting the laces to length. The set is e.g. available here.
The repair itself is really simple and can be carried out with virtually no additional tools. All you need is a pair of pliers to shorten the laces to the right length.

Boa sends both fasteners, new laces and a small tool in the set. All you need is a small pair of pliers to shorten the ropesPhoto: Stefan FreyBoa sends both fasteners, new laces and a small tool in the set. All you need is a small pair of pliers to shorten the ropes

The repair step by step

Caution when repairing: The Boa wheels have a defined direction of rotation. You must therefore choose the correct spare part. Red is for the right-hand side of the L6 parts, purple for the left-hand side. The Li2 wheels are black and grey on the back.

When replacing, you must pay attention to the correct side. The colour tells you which wheel belongs wherePhoto: Stefan FreyWhen replacing, you must pay attention to the correct side. The colour tells you which wheel belongs where

1. remove defective wheel

If the rotating wheel is still in the holder, the first step is to remove it. To do this, open the shutter by pulling the wheel upwards. You can then insert the small metal lever between the bayonet and the wheel and release the shutter from its anchoring.

Use the small tool to lever the wheel out of the bayonetPhoto: Stefan FreyUse the small tool to lever the wheel out of the bayonet

2. replace cable pull

Next, you can remove the old laces and loosely thread the new laces into the shoe from below. Before doing this, you should memorise the course of the laces well; some manufacturers use a special logic for threading, which should be followed at all costs.

It is best to cut off the old laces with a small pair of pliersPhoto: Stefan FreyIt is best to cut off the old laces with a small pair of pliersThe new cable can then be threaded in. Hopefully you have memorised the correct cable routing!Photo: Stefan FreyThe new cable can then be threaded in. Hopefully you have memorised the correct cable routing!

The laces of the boa fasteners often run through small plastic sleeves. This makes threading the new ropes much easier. In my case, Suplest opted for fabric tabs. Unfortunately, the laces always get tangled up in the material when threading. That's why I resorted to a little trick. A sturdy needle with a sufficiently large eye helps when laying the laces - it works really well.

A needle helps to thread the lace through the fabric flapsPhoto: Stefan FreyA needle helps to thread the lace through the fabric flaps


3. shorten the laces

The new laces can now be shortened to the right length using a pair of pliers. To do this, grip both ends with your thumb and index finger and guide the laces past the bayonet on the shoe. Cut off the new laces about 10 to 12 centimetres behind the bayonet. Alternatively: You can of course also use the old laces as a measurement, then the length will be correct in any case.

The lace should protrude 10 to 12 centimetres from the bayonetPhoto: Stefan FreyThe lace should protrude 10 to 12 centimetres from the bayonetBoth ends are shortened to the same length using the pliersPhoto: Stefan FreyBoth ends are shortened to the same length using the pliers

Before inserting the lace into the new wheel, make sure that it is closed, i.e. pressed downwards. The small arrow on the back must be in line with the marking on the outer ring so that the lace can be inserted.

The rope ends can only be inserted when the two markings are on top of each otherPhoto: Stefan FreyThe rope ends can only be inserted when the two markings are on top of each other

4. insert the cable into the wheel

The upper end of the lanyard is now inserted into the upper opening of the wheel and the lower end into the lower opening. Both ends should come out at the back of the wheel. The rope should never cross in front of the wheel!

The upper end goes - quite logically - into the upper opening on the wheelPhoto: Stefan FreyThe upper end goes - quite logically - into the upper opening on the wheelThen thread the lower end through the lower openingPhoto: Stefan FreyThen thread the lower end through the lower opening

5. knot the ends of the laces

The next step is to tie a simple knot - also known as a pretzel knot - in the upper lace. The knot is tightened with the eyelet in the tool. The last steps are repeated with the lower end of the lace.

Both ends are provided with a simple knotPhoto: Stefan FreyBoth ends are provided with a simple knotThe eyelet on the tool is then used to tighten the knotsPhoto: Stefan FreyThe eyelet on the tool is then used to tighten the knots

Using the small scale on the tool, the ends behind the knots can be shortened to 4 to 7 millimetres. Now you can pull the laces back into the housing.

6. insert the wheel in the bayonet

The laces should now have completely disappeared into the housing. If this is the case, push the back of the wheel into the rear lug on the bayonet and press the wheel into the front of the catch. It should click into place.

The new rotating wheel is inserted into the bayonet from above. Press firmly once and it engages securelyPhoto: Stefan FreyThe new rotating wheel is inserted into the bayonet from above. Press firmly once and it engages securelyThe shoe is almost as good as new again. Ok, it could do with a cleanPhoto: Stefan FreyThe shoe is almost as good as new again. Ok, it could do with a clean

Stefan Frey is from Lower Bavaria and loves the mossy, loamy trails of the Bavarian Forest as much as the rugged rock of the Dolomites. For technical descents, he is prepared to tackle almost any ascent - under his own steam. As an accessories specialist, he is the first port of call for questions about equipment and add-on parts, while as head of copywriting he sweeps the language crumbs from the pages of the BIKE print editions.

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